Update dependency babel-plugin-graphql-tag to v2

Author: renovate-bot

package-lock.json

@@ -54,7 +54,7 @@
     "@babel/register": "7.0.0",
     "babel-core": "7.0.0-bridge.0",
     "babel-jest": "23.6.0",
-    "babel-plugin-graphql-tag": "1.6.0",
+    "babel-plugin-graphql-tag": "2.4.0",
     "babel-plugin-module-resolver": "3.1.1",
     "bl": "2.1.2",
     "eslint": "5.12.0",