test: use proper typings in e2e app

Switches to use the typings from @types for the e2e app.

Relates to #2025.

Author: crisbeto

e2e/e2e.d.ts

@@ -11,9 +11,9 @@
     "outDir": "../dist/e2e/",
     "rootDir": ".",
     "sourceMap": true,
-    "target": "es5"
-  },
-  "files": [
-    "e2e.d.ts"
-  ]
+    "target": "es5",
+    "typeRoots": [
+      "../node_modules/@types"
+    ]
+  }
 }

e2e/tsconfig.json

@@ -49,8 +49,10 @@
     "@types/merge2": "0.0.28",
     "@types/minimist": "^1.1.28",
     "@types/node": "^6.0.34",
+    "@types/protractor": "^4.0.0",
     "@types/run-sequence": "0.0.27",
     "@types/rx": "^2.5.33",
+    "@types/selenium-webdriver": "^2.53.36",
     "browserstacktunnel-wrapper": "^2.0.0",
     "conventional-changelog": "^1.1.0",
     "express": "^4.14.0",