Re-add old GraphQL loader

client/build/webpack.base.conf.js

@@ -69,15 +69,8 @@ module.exports = {
       },
       {
         test: /\.(gql|graphql)$/,
-        use: [
+        loader: 'graphql-tag/loader',
-          {
+        exclude: /node_modules/
-            loader: 'webpack-graphql-loader',
-            options: {
-              output: 'document',
-            },
-          },
-        ],
-        exclude: /node_modules/,
       },
       {
         test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,