Add yarn.lock to .gitignore

wooorm · wooorm · commit 077992a2fcce · 2018-08-20T15:25:38.000+02:00
diff --git a/.gitignore b/.gitignore
@@ -5,3 +5,4 @@ coverage/
 node_modules/
 mdast-zone.js
 mdast-zone.min.js
+yarn.lock
