fix missing comma

Author: LinusBorg

template/package.json

@@ -68,7 +68,7 @@
     {{#if_eq runner "jest"}}
     "babel-jest": "^21.0.2",
     "babel-plugin-dynamic-import-node": "^1.2.0",
-    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0"
+    "babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
     "jest": "^21.2.0",
     "jest-serializer-vue": "^0.3.0",
     "vue-jest": "^1.0.2",