add yarn.lock

Author: bertho-zero

.gitignore

@@ -1,12 +1,12 @@
 .idea/
 node_modules/
-yarn.lock
 package-lock.json
+npm-debug.log
+yarn-error.log
 static/dist/
 *.iml
 webpack-assets.json
 webpack-stats.json
-npm-debug.log
 .happypack
 webpack/dlls/*.json
 api/**/*.nedb