fix gitpack build

Author: eericxu

cslibrary/build.gradle

@@ -5,6 +5,8 @@ apply plugin: 'kotlin-android'
 apply plugin: 'kotlin-android-extensions'
 
 repositories {
+    google()
+    jcenter()
     maven { url "https://jitpack.io" }
 }
 
@@ -22,17 +24,23 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
-
     buildToolsVersion '28.0.3'
 }
 
-
-
-
 dependencies {
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
     implementation 'androidx.appcompat:appcompat:1.1.0'
 
 }
+
+
+
+task classesJar(type: Jar) {
+    from "$buildDir/intermediates/classes/release"
+}
+
+artifacts {
+    archives classesJar
+}