test: add e2e for typescript 2.4 and 2.7

Author: hansl

tests/e2e/tests/build/typescript/typescript-2_4.ts

@@ -0,0 +1,8 @@
+import { ng, npm } from '../../../utils/process';
+
+export default async function () {
+ await npm('install', 'typescript@2.4');
+ await ng('build');
+ await ng('build', '--prod');
+ await npm('install', 'typescript@2.6');
+}

tests/e2e/tests/build/typescript/typescript-2_7.ts

@@ -0,0 +1,8 @@
+import { ng, npm } from '../../../utils/process';
+
+export default async function () {
+ await npm('install', 'typescript@2.7');
+ await ng('build');
+ await ng('build', '--prod');
+ await npm('install', 'typescript@2.6');
+}