diff --git a/frontend/package-lock.json b/frontend/package-lock.json
index c421cf1..46e9b70 100644
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -4112,9 +4112,9 @@
       "dev": true
     },
     "decode-uri-component": {
-      "version": "0.2.0",
-      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.0.tgz",
-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "version": "0.2.2",
+      "resolved": "https://registry.npmjs.org/decode-uri-component/-/decode-uri-component-0.2.2.tgz",
+      "integrity": "sha512-FqUYQ+8o158GyGTrMFJms9qh3CqTKvAqgqsTnkLI8sKu0028orqBhxNMFkFen0zGyg6epACD32pjVk58ngIErQ==",
       "dev": true
     },
     "deep-equal": {
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index d26cf65..7ff0aea 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -1091,6 +1091,14 @@ alphanum-sort@^1.0.0:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/alphanum-sort/-/alphanum-sort-1.0.2.tgz#97a1119649b211ad33691d9f9f486a8ec9fbe0a3"
 
+amazon-cognito-identity-js@^3.2.1:
+  version "3.3.3"
+  resolved "https://registry.yarnpkg.com/amazon-cognito-identity-js/-/amazon-cognito-identity-js-3.3.3.tgz#3c10a91def29b998d0974bf7ce63a262a6d4dd89"
+  dependencies:
+    buffer "4.9.1"
+    crypto-js "^3.1.9-1"
+    js-cookie "^2.1.4"
+
 ansi-colors@^3.0.0:
   version "3.2.4"
   resolved "https://registry.yarnpkg.com/ansi-colors/-/ansi-colors-3.2.4.tgz#e3a3da4bfbae6c86a9c285625de124a234026fbf"
@@ -1256,6 +1264,25 @@ autoprefixer@^9.5.1:
     postcss "^7.0.17"
     postcss-value-parser "^4.0.0"
 
+available-typed-arrays@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/available-typed-arrays/-/available-typed-arrays-1.0.5.tgz#92f95616501069d07d10edb2fc37d3e1c65123b7"
+
+aws-sdk@^2.599.0:
+  version "2.1267.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.1267.0.tgz#8f45c7bc7efb89a757526d993c5f77a2e7208676"
+  dependencies:
+    buffer "4.9.2"
+    events "1.1.1"
+    ieee754 "1.1.13"
+    jmespath "0.16.0"
+    querystring "0.2.0"
+    sax "1.2.1"
+    url "0.10.3"
+    util "^0.12.4"
+    uuid "8.0.0"
+    xml2js "0.4.19"
+
 aws-sign2@~0.7.0:
   version "0.7.0"
   resolved "https://registry.yarnpkg.com/aws-sign2/-/aws-sign2-0.7.0.tgz#b46e890934a9591f2d2f6f86d7e6a9f1b3fe76a8"
@@ -1264,6 +1291,12 @@ aws4@^1.8.0:
   version "1.8.0"
   resolved "https://registry.yarnpkg.com/aws4/-/aws4-1.8.0.tgz#f0e003d9ca9e7f59c7a508945d7b2ef9a04a542f"
 
+axios@^0.19.1:
+  version "0.19.2"
+  resolved "https://registry.yarnpkg.com/axios/-/axios-0.19.2.tgz#3ea36c5d8818d0d5f8a8a97a6d36b86cdc00cb27"
+  dependencies:
+    follow-redirects "1.5.10"
+
 babel-code-frame@^6.22.0, babel-code-frame@^6.26.0:
   version "6.26.0"
   resolved "https://registry.yarnpkg.com/babel-code-frame/-/babel-code-frame-6.26.0.tgz#63fd43f7dc1e3bb7ce35947db8fe369a3f58c74b"
@@ -1496,7 +1529,7 @@ buffer-xor@^1.0.3:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/buffer-xor/-/buffer-xor-1.0.3.tgz#26e61ed1422fb70dd42e6e36729ed51d855fe8d9"
 
-buffer@^4.3.0:
+buffer@4.9.1, buffer@^4.3.0:
   version "4.9.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.1.tgz#6d1bb601b07a4efced97094132093027c95bc298"
   dependencies:
@@ -1504,6 +1537,14 @@ buffer@^4.3.0:
     ieee754 "^1.1.4"
     isarray "^1.0.0"
 
+buffer@4.9.2:
+  version "4.9.2"
+  resolved "https://registry.yarnpkg.com/buffer/-/buffer-4.9.2.tgz#230ead344002988644841ab0244af8c44bbe3ef8"
+  dependencies:
+    base64-js "^1.0.2"
+    ieee754 "^1.1.4"
+    isarray "^1.0.0"
+
 builtin-status-codes@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/builtin-status-codes/-/builtin-status-codes-3.0.0.tgz#85982878e21b98e1c66425e03d0174788f569ee8"
@@ -1578,6 +1619,13 @@ cache-loader@^2.0.1:
     normalize-path "^3.0.0"
     schema-utils "^1.0.0"
 
+call-bind@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/call-bind/-/call-bind-1.0.2.tgz#b1d4e89e688119c3c9a903ad30abb2f6a919be3c"
+  dependencies:
+    function-bind "^1.1.1"
+    get-intrinsic "^1.0.2"
+
 call-me-maybe@^1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/call-me-maybe/-/call-me-maybe-1.0.1.tgz#26d208ea89e37b5cbde60250a15f031c16a4d66b"
@@ -1967,6 +2015,10 @@ copy-webpack-plugin@^4.6.0:
     p-limit "^1.0.0"
     serialize-javascript "^1.4.0"
 
+core-js@^2.5.7:
+  version "2.6.12"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.12.tgz#d9333dfa7b065e347cc5682219d6f690859cc2ec"
+
 core-js@^2.6.5:
   version "2.6.9"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.9.tgz#6b4b214620c834152e179323727fc19741b084f2"
@@ -2046,6 +2098,10 @@ crypto-browserify@^3.11.0:
     randombytes "^2.0.0"
     randomfill "^1.0.3"
 
+crypto-js@^3.1.9-1:
+  version "3.3.0"
+  resolved "https://registry.yarnpkg.com/crypto-js/-/crypto-js-3.3.0.tgz#846dd1cce2f68aacfa156c8578f926a609b7976b"
+
 css-color-names@0.0.4, css-color-names@^0.0.4:
   version "0.0.4"
   resolved "https://registry.yarnpkg.com/css-color-names/-/css-color-names-0.0.4.tgz#808adc2e79cf84738069b646cb20ec27beb629e0"
@@ -2230,6 +2286,12 @@ debug@2.6.9, debug@^2.2.0, debug@^2.3.3:
   dependencies:
     ms "2.0.0"
 
+debug@=3.1.0:
+  version "3.1.0"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
+  dependencies:
+    ms "2.0.0"
+
 debug@^3.1.0, debug@^3.2.5, debug@^3.2.6:
   version "3.2.6"
   resolved "https://registry.yarnpkg.com/debug/-/debug-3.2.6.tgz#e83d17de16d8a7efb7717edbe5fb10135eee629b"
@@ -2247,8 +2309,8 @@ decamelize@^1.2.0:
   resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
 
 decode-uri-component@^0.2.0:
-  version "0.2.0"
-  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.0.tgz#eb3913333458775cb84cd1a1fae062106bb87545"
+  version "0.2.2"
+  resolved "https://registry.yarnpkg.com/decode-uri-component/-/decode-uri-component-0.2.2.tgz#e69dbe25d37941171dd540e024c444cd5188e1e9"
 
 deep-equal@^1.0.1:
   version "1.0.1"
@@ -2455,6 +2517,10 @@ dotenv@^7.0.0:
   version "7.0.0"
   resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-7.0.0.tgz#a2be3cd52736673206e8a85fb5210eea29628e7c"
 
+dropzone@^5.5.1:
+  version "5.9.3"
+  resolved "https://registry.yarnpkg.com/dropzone/-/dropzone-5.9.3.tgz#b3070ae090fa48cbc04c17535635537ca72d70d6"
+
 duplexer@^0.1.1:
   version "0.1.1"
   resolved "https://registry.yarnpkg.com/duplexer/-/duplexer-0.1.1.tgz#ace6ff808c1ce66b57d1ebf97977acb02334cfc1"
@@ -2778,6 +2844,10 @@ eventemitter3@^3.0.0:
   version "3.1.2"
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-3.1.2.tgz#2d3d48f9c346698fce83a85d7d664e98535df6e7"
 
+events@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/events/-/events-1.1.1.tgz#9ebdb7635ad099c70dcc4c2a1f5004288e8bd924"
+
 events@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/events/-/events-3.0.0.tgz#9a0a0dfaf62893d92b875b8f2698ca4114973e88"
@@ -3110,12 +3180,24 @@ flush-write-stream@^1.0.0:
     inherits "^2.0.3"
     readable-stream "^2.3.6"
 
+follow-redirects@1.5.10:
+  version "1.5.10"
+  resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.5.10.tgz#7b7a9f9aea2fdff36786a94ff643ed07f4ff5e2a"
+  dependencies:
+    debug "=3.1.0"
+
 follow-redirects@^1.0.0:
   version "1.7.0"
   resolved "https://registry.yarnpkg.com/follow-redirects/-/follow-redirects-1.7.0.tgz#489ebc198dc0e7f64167bd23b03c4c19b5784c76"
   dependencies:
     debug "^3.2.6"
 
+for-each@^0.3.3:
+  version "0.3.3"
+  resolved "https://registry.yarnpkg.com/for-each/-/for-each-0.3.3.tgz#69b447e88a0a5d32c3e7084f3f1710034b21376e"
+  dependencies:
+    is-callable "^1.1.3"
+
 for-in@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
@@ -3216,6 +3298,14 @@ get-caller-file@^2.0.1:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
 
+get-intrinsic@^1.0.2, get-intrinsic@^1.1.3:
+  version "1.1.3"
+  resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.1.3.tgz#063c84329ad93e83893c7f4f243ef63ffa351385"
+  dependencies:
+    function-bind "^1.1.1"
+    has "^1.0.3"
+    has-symbols "^1.0.3"
+
 get-stream@^3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/get-stream/-/get-stream-3.0.0.tgz#8e943d1358dc37555054ecbe2edb05aa174ede14"
@@ -3302,6 +3392,12 @@ globby@^9.2.0:
     pify "^4.0.1"
     slash "^2.0.0"
 
+gopd@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/gopd/-/gopd-1.0.1.tgz#29ff76de69dac7489b7c0918a5788e56477c332c"
+  dependencies:
+    get-intrinsic "^1.1.3"
+
 graceful-fs@^4.1.11, graceful-fs@^4.1.15, graceful-fs@^4.1.2, graceful-fs@^4.1.6:
   version "4.2.2"
   resolved "https://registry.yarnpkg.com/graceful-fs/-/graceful-fs-4.2.2.tgz#6f0952605d0140c1cfdb138ed005775b92d67b02"
@@ -3342,6 +3438,16 @@ has-symbols@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.0.tgz#ba1a8f1af2a0fc39650f5c850367704122063b44"
 
+has-symbols@^1.0.2, has-symbols@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.0.3.tgz#bb7b2c4349251dce87b125f7bdf874aa7c8b39f8"
+
+has-tostringtag@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/has-tostringtag/-/has-tostringtag-1.0.0.tgz#7e133818a7d394734f941e73c3d3f9291e658b25"
+  dependencies:
+    has-symbols "^1.0.2"
+
 has-unicode@^2.0.0:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/has-unicode/-/has-unicode-2.0.1.tgz#e0e6fe6a28cf51138855e086d1691e771de2a8b9"
@@ -3571,7 +3677,7 @@ icss-utils@^2.1.0:
   dependencies:
     postcss "^6.0.1"
 
-ieee754@^1.1.4:
+ieee754@1.1.13, ieee754@^1.1.4:
   version "1.1.13"
   resolved "https://registry.yarnpkg.com/ieee754/-/ieee754-1.1.13.tgz#ec168558e95aa181fd87d37f55c32bbcb6708b84"
 
@@ -3751,6 +3857,13 @@ is-accessor-descriptor@^1.0.0:
   dependencies:
     kind-of "^6.0.0"
 
+is-arguments@^1.0.4:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/is-arguments/-/is-arguments-1.1.1.tgz#15b3f88fda01f2a97fec84ca761a560f123efa9b"
+  dependencies:
+    call-bind "^1.0.2"
+    has-tostringtag "^1.0.0"
+
 is-arrayish@^0.2.1:
   version "0.2.1"
   resolved "https://registry.yarnpkg.com/is-arrayish/-/is-arrayish-0.2.1.tgz#77c99840527aa8ecb1a8ba697b80645a7a926a9d"
@@ -3769,6 +3882,10 @@ is-buffer@^1.1.5:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/is-buffer/-/is-buffer-1.1.6.tgz#efaa2ea9daa0d7ab2ea13a97b2b8ad51fefbe8be"
 
+is-callable@^1.1.3:
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.2.7.tgz#3bc2a85ea742d9e36205dcacdd72ca1fdc51b055"
+
 is-callable@^1.1.4:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/is-callable/-/is-callable-1.1.4.tgz#1e1adf219e1eeb684d691f9d6a05ff0d30a24d75"
@@ -3850,6 +3967,12 @@ is-fullwidth-code-point@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz#a3b30a5c4f199183167aaab93beefae3ddfb654f"
 
+is-generator-function@^1.0.7:
+  version "1.0.10"
+  resolved "https://registry.yarnpkg.com/is-generator-function/-/is-generator-function-1.0.10.tgz#f1558baf1ac17e0deea7c0415c438351ff2b3c72"
+  dependencies:
+    has-tostringtag "^1.0.0"
+
 is-glob@^3.1.0:
   version "3.1.0"
   resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-3.1.0.tgz#7ba5ae24217804ac70707b96922567486cc3e84a"
@@ -3932,6 +4055,16 @@ is-symbol@^1.0.2:
   dependencies:
     has-symbols "^1.0.0"
 
+is-typed-array@^1.1.10, is-typed-array@^1.1.3:
+  version "1.1.10"
+  resolved "https://registry.yarnpkg.com/is-typed-array/-/is-typed-array-1.1.10.tgz#36a5b5cb4189b575d1a3e4b08536bfb485801e3f"
+  dependencies:
+    available-typed-arrays "^1.0.5"
+    call-bind "^1.0.2"
+    for-each "^0.3.3"
+    gopd "^1.0.1"
+    has-tostringtag "^1.0.0"
+
 is-typedarray@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/is-typedarray/-/is-typedarray-1.0.0.tgz#e479c80858df0c1b11ddda6940f96011fcda4a9a"
@@ -3970,6 +4103,14 @@ javascript-stringify@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/javascript-stringify/-/javascript-stringify-1.6.0.tgz#142d111f3a6e3dae8f4a9afd77d45855b5a9cce3"
 
+jmespath@0.16.0:
+  version "0.16.0"
+  resolved "https://registry.yarnpkg.com/jmespath/-/jmespath-0.16.0.tgz#b15b0a85dfd4d930d43e69ed605943c802785076"
+
+js-cookie@^2.1.4:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/js-cookie/-/js-cookie-2.2.1.tgz#69e106dc5d5806894562902aa5baec3744e9b2b8"
+
 js-levenshtein@^1.1.3:
   version "1.1.6"
   resolved "https://registry.yarnpkg.com/js-levenshtein/-/js-levenshtein-1.1.6.tgz#c6cee58eb3550372df8deb85fad5ce66ce01d59d"
@@ -5910,7 +6051,11 @@ safe-regex@^1.1.0:
   version "2.1.2"
   resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
 
-sax@^1.2.4, sax@~1.2.4:
+sax@1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.1.tgz#7b8e656190b228e81a66aea748480d828cd2d37a"
+
+sax@>=0.6.0, sax@^1.2.4, sax@~1.2.4:
   version "1.2.4"
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
 
@@ -6729,6 +6874,13 @@ url-parse@^1.4.3:
     querystringify "^2.1.1"
     requires-port "^1.0.0"
 
+url@0.10.3:
+  version "0.10.3"
+  resolved "https://registry.yarnpkg.com/url/-/url-0.10.3.tgz#021e4d9c7705f21bbf37d03ceb58767402774c64"
+  dependencies:
+    punycode "1.3.2"
+    querystring "0.2.0"
+
 url@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"
@@ -6763,6 +6915,16 @@ util@^0.11.0:
   dependencies:
     inherits "2.0.3"
 
+util@^0.12.4:
+  version "0.12.5"
+  resolved "https://registry.yarnpkg.com/util/-/util-0.12.5.tgz#5f17a6059b73db61a875668781a1c2b136bd6fbc"
+  dependencies:
+    inherits "^2.0.3"
+    is-arguments "^1.0.4"
+    is-generator-function "^1.0.7"
+    is-typed-array "^1.1.3"
+    which-typed-array "^1.1.2"
+
 utila@^0.4.0, utila@~0.4:
   version "0.4.0"
   resolved "https://registry.yarnpkg.com/utila/-/utila-0.4.0.tgz#8a16a05d445657a3aea5eecc5b12a4fa5379772c"
@@ -6771,6 +6933,10 @@ utils-merge@1.0.1:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
 
+uuid@8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/uuid/-/uuid-8.0.0.tgz#bc6ccf91b5ff0ac07bbcdbf1c7c4e150db4dbb6c"
+
 uuid@^3.0.1, uuid@^3.3.2:
   version "3.3.3"
   resolved "https://registry.yarnpkg.com/uuid/-/uuid-3.3.3.tgz#4568f0216e78760ee1dbf3a4d2cf53e224112866"
@@ -6856,6 +7022,12 @@ vue-template-es2015-compiler@^1.9.0:
   version "1.9.1"
   resolved "https://registry.yarnpkg.com/vue-template-es2015-compiler/-/vue-template-es2015-compiler-1.9.1.tgz#1ee3bc9a16ecbf5118be334bb15f9c46f82f5825"
 
+vue2-dropzone@^3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/vue2-dropzone/-/vue2-dropzone-3.6.0.tgz#b4bb4b64de1cbbb3b88f04b24878e06780a51546"
+  dependencies:
+    dropzone "^5.5.1"
+
 vue@^2.6.10:
   version "2.6.10"
   resolved "https://registry.yarnpkg.com/vue/-/vue-2.6.10.tgz#a72b1a42a4d82a721ea438d1b6bf55e66195c637"
@@ -7016,6 +7188,17 @@ which-module@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
 
+which-typed-array@^1.1.2:
+  version "1.1.9"
+  resolved "https://registry.yarnpkg.com/which-typed-array/-/which-typed-array-1.1.9.tgz#307cf898025848cf995e795e8423c7f337efbde6"
+  dependencies:
+    available-typed-arrays "^1.0.5"
+    call-bind "^1.0.2"
+    for-each "^0.3.3"
+    gopd "^1.0.1"
+    has-tostringtag "^1.0.0"
+    is-typed-array "^1.1.10"
+
 which@^1.2.9:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
@@ -7075,6 +7258,17 @@ ws@^6.0.0, ws@^6.2.1:
   dependencies:
     async-limiter "~1.0.0"
 
+xml2js@0.4.19:
+  version "0.4.19"
+  resolved "https://registry.yarnpkg.com/xml2js/-/xml2js-0.4.19.tgz#686c20f213209e94abf0d1bcf1efaa291c7827a7"
+  dependencies:
+    sax ">=0.6.0"
+    xmlbuilder "~9.0.1"
+
+xmlbuilder@~9.0.1:
+  version "9.0.7"
+  resolved "https://registry.yarnpkg.com/xmlbuilder/-/xmlbuilder-9.0.7.tgz#132ee63d2ec5565c557e20f4c22df9aca686b10d"
+
 xtend@^4.0.0, xtend@~4.0.1:
   version "4.0.2"
   resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"