Moved to ts2.1

Tools/Gulp/gulpfile.js

@@ -36,7 +36,7 @@ var decorateSearchRegex = /var\s__decorate[\s\S]+?\};/g;
  * TS configurations shared in the gulp file.
  */
 var tsConfig = {
-    noExternalResolve: true,
+    noResolve: true,
     target: 'ES5',
     declarationFiles: true,
     typescript: require('typescript'),
@@ -46,7 +46,7 @@ var tsConfig = {
 var tsProject = typescript.createProject(tsConfig);
 
 var externalTsConfig = {
-    noExternalResolve: false,
+    noResolve: false,
     target: 'ES5',
     declarationFiles: true,
     typescript: require('typescript'),
@@ -194,7 +194,7 @@ gulp.task("build-custom", ["shaders"], function () {
 gulp.task('typescript-compile', function () {
     var tsResult = gulp.src(config.core.typescript)
         .pipe(sourcemaps.init())
-        .pipe(typescript(tsProject));
+        .pipe(tsProject());
 
     //If this gulp task is running on travis, file the build!
     if (process.env.TRAVIS) {

Tools/Gulp/package.json

@@ -1,6 +1,6 @@
 {
   "name": "BabylonJS",
-  "version": "2.4.0",
+  "version": "2.5.0",
   "description": "Babylon.js is a 3D engine based on webgl and javascript",
   "main": "",
   "repository": { "url": "https://github.com/BabylonJS/Babylon.js/" },
@@ -10,8 +10,8 @@
     "gulp": "^3.8.11",
     "gulp-uglify": "~1.5.3",
     "gulp-sourcemaps": "~1.9.1",
-    "typescript": "^1.7.5",
-    "gulp-typescript": "~2.13.0",
+    "typescript": "^2.1.4",
+    "gulp-typescript": "^3.1.3",
     "through2": "~0.6.5",
     "gulp-util": "~3.0.4",
     "gulp-concat": "~2.5.2",