Merge from vscode 64980ea1f3f532c82bb6c28d27bba9ef2c5b4463 (#7206)

* Merge from vscode 64980ea1f3f532c82bb6c28d27bba9ef2c5b4463

* fix config changes

* fix strictnull checks

build/azure-pipelines/exploration-build.yml

@@ -1,6 +1,13 @@
 pool:
   vmImage: 'Ubuntu-16.04'
 
+trigger:
+  branches:
+    include: ['master']
+pr:
+  branches:
+    include: ['master']
+
 steps:
 - task: NodeTool@0
   inputs:
@@ -31,13 +38,3 @@ steps:
     git push origin HEAD:electron-6.0.x
 
   displayName: Sync & Merge Exploration
-
-trigger: none
-pr: none
-
-schedules:
-- cron: "0 5 * * Mon-Fri"
-  displayName: Mon-Fri at 7:00
-  branches:
-    include:
-    - master