feat(@angular-devkit/build-optimizer): update typescript dependency to 3.0.x

Author: alan-agius4

packages/angular_devkit/build_angular/test/browser/build-optimizer_spec_large.ts

@@ -21,7 +21,7 @@ describe('Browser Builder build optimizer', () => {
 
   it('works', (done) => {
     const overrides = { aot: true, buildOptimizer: true };
-    runTargetSpec(host, browserTargetSpec, overrides).pipe(
+    runTargetSpec(host, browserTargetSpec, overrides, DefaultTimeout * 3).pipe(
       tap((buildEvent) => expect(buildEvent.success).toBe(true)),
       tap(() => {
         const content = virtualFs.fileBufferToString(host.scopedSync().read(normalize(fileName)));

packages/angular_devkit/build_optimizer/package.json

@@ -11,7 +11,7 @@
   "dependencies": {
     "loader-utils": "^1.1.0",
     "source-map": "^0.5.6",
-    "typescript": "~2.9.2",
+    "typescript": "~3.0.1",
     "webpack-sources": "^1.1.0"
   }
 }