chore(ts2dart): remove hand-written ts2dart typings

Now that we are on TS 1.6, we can use the new node module resolution strategy.

Closes angular#4372

Author: alexeagle

npm-shrinkwrap.clean.json

@@ -10026,7 +10026,7 @@
       }
     },
     "ts2dart": {
-      "version": "0.7.5",
+      "version": "0.7.7",
       "dependencies": {
         "source-map": {
           "version": "0.4.4",

npm-shrinkwrap.json

@@ -128,7 +128,7 @@
     "temp": "^0.8.1",
     "ternary-stream": "^1.2.3",
     "through2": "^0.6.1",
-    "ts2dart": "^0.7.5",
+    "ts2dart": "^0.7.7",
     "tsd": "^0.6.5-beta",
     "tslint": "^2.5.0",
     "typescript": "^1.6.2",

package.json

@@ -1,20 +1,19 @@
 /// <reference path="../typings/node/node.d.ts" />
 /// <reference path="../typings/fs-extra/fs-extra.d.ts" />
-/// <reference path="./ts2dart.d.ts" />
 
 import fs = require('fs');
 import fse = require('fs-extra');
 import path = require('path');
-import ts2dart = require('ts2dart');
+import * as ts2dart from 'ts2dart';
 import {wrapDiffingPlugin, DiffingBroccoliPlugin, DiffResult} from './diffing-broccoli-plugin';
 
 class TSToDartTranspiler implements DiffingBroccoliPlugin {
   static includeExtensions = ['.ts'];
 
-  private basePath: string;
   private transpiler: ts2dart.Transpiler;
 
-  constructor(public inputPath: string, public cachePath: string, public options) {
+  constructor(public inputPath: string, public cachePath: string,
+              public options: ts2dart.TranspilerOptions) {
     options.basePath = inputPath;
     this.transpiler = new ts2dart.Transpiler(options);
   }