Update gitignore (#149)

.gitignore

@@ -2,5 +2,6 @@
 node_modules/
 dist/
 npm-debug.log
+yarn-error.log
 .idea
 *.iml
\ No newline at end of file

package.json

@@ -53,4 +53,4 @@
     "webpack-merge": "^4.0.0",
     "webpack-node-externals": "^1.5.4"
   }
-}
+}
\ No newline at end of file

yarn.lock

@@ -4202,4 +4202,4 @@ yargs@~3.10.0:
     camelcase "^1.0.2"
     cliui "^2.1.0"
     decamelize "^1.0.0"
-    window-size "0.1.0"
+    window-size "0.1.0"
\ No newline at end of file