Update to latest TS 2.7 insiders

extensions/package.json

@@ -3,7 +3,7 @@
   "version": "0.0.1",
   "description": "Dependencies shared by all extensions",
   "dependencies": {
-    "typescript": "2.7.0-insiders.20171214"
+    "typescript": "2.7.0-insiders.20180108"
   },
   "scripts": {
     "postinstall": "node ./postinstall"

extensions/yarn.lock

@@ -2,6 +2,6 @@
 # yarn lockfile v1
 
 
-typescript@2.7.0-insiders.20171214:
-  version "2.7.0-insiders.20171214"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.0-insiders.20171214.tgz#841344ddae5f498a97c0435fcd12860480050e71"
+typescript@2.7.0-insiders.20180108:
+  version "2.7.0-insiders.20180108"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.7.0-insiders.20180108.tgz#b9230ca5a0020e92133f63e6a4272f8c1b301bdb"