Change tslint config to allow default export

Author: vardhanapoorv

src/index.ts

@@ -1,4 +1,4 @@
-import * as dgraph from './dgraph';
+import * as dgraph from "./dgraph";
 
 export * from "./dgraph";
-export default dgraph;
+export default dgraph;

tslint.json

@@ -15,6 +15,7 @@
     "insecure-random": false,
     "no-multiline-string": false,
     "newline-per-chained-call": false,
+    "no-default-export": false,
     "trailing-comma": [
       true,
       {