Flatten rules after oneOf was added to create-react-app webpack configs

see facebook/create-react-app#2747

Author: tb

index.js

@@ -2,8 +2,10 @@
 function rewireGraphQLTag(config, env) {
     const gqlExtension = /\.(graphql|gql)$/
 
-    const fileLoader = config.module.rules.find(rule=> rule.loader && rule.loader.indexOf("file-loader")!==-1);
-    fileLoader.exclude.push(gqlExtension);
+    const fileLoader = flatten(config.module.rules.map((rule) => rule.oneOf || rule))
+        .find((rule) => rule.loader && rule.loader.indexOf("file-loader")!==-1);
+
+    fileLoader && fileLoader.exclude.push(gqlExtension);
 
     const gqlTagRule = {
         test: gqlExtension,

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-app-rewire-graphql-tag",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "description": "rewire your react-app and use graphql-tag",
   "main": "index.js",
   "scripts": {