fix(graphql): add root plugin entry

Author: kamilmysliwiec

packages/graphql/package.json

@@ -7,7 +7,8 @@
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "plugin.js"
   ],
   "publishConfig": {
     "access": "public"

packages/graphql/plugin.js

@@ -0,0 +1,4 @@
+'use strict';
+Object.defineProperty(exports, '__esModule', { value: true });
+const tslib_1 = require('tslib');
+(0, tslib_1.__exportStar)(require('./dist/plugin'), exports);