Merge from vscode 81d7885dc2e9dc617e1522697a2966bc4025a45d (#5949)

* Merge from vscode 81d7885dc2e9dc617e1522697a2966bc4025a45d

* Fix vs unit tests and hygiene issue

* Fix strict null check issue

build/package.json

@@ -1,6 +1,7 @@
 {
   "name": "azuredatastudio-oss-dev-build",
   "version": "1.0.0",
+  "license": "MIT",
   "devDependencies": {
     "@types/ansi-colors": "^3.2.0",
     "@types/azure": "0.9.19",
@@ -43,7 +44,7 @@
     "request": "^2.85.0",
     "tslint": "^5.9.1",
     "service-downloader": "github:anthonydresser/service-downloader#0.1.5",
-    "typescript": "3.4.5",
+    "typescript": "3.5.1",
     "vsce": "1.48.0",
     "xml2js": "^0.4.17"
   },