refactor: update get-stdin typings (#220)

Author: KnisterPeter

src/index.ts

@@ -1,7 +1,6 @@
 import * as fs from 'fs';
 import * as babylon from 'babylon';
-import * as getStdinTs from 'get-stdin';
-const getStdin: typeof getStdinTs.getStdin = getStdinTs as any;
+import * as getStdin from 'get-stdin';
 
 import { generateTypings } from './deprecated';
 import { Generator } from './generator';

typings/get-stdin.d.ts

@@ -1,3 +1,5 @@
 declare module 'get-stdin' {
-  export function getStdin(): PromiseLike<string>;
+  function getStdin(): PromiseLike<string>;
+  namespace getStdin {}
+  export = getStdin;
 }