Merge pull request microsoft#39989 from amcasey/pinned-release-4.0

Pin dependencies in release branch

Author: amcasey

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [10.x, 12.x, 13.x]
+        node-version: [10.x, 12.x, 14.x]
 
     steps:
     - uses: actions/checkout@v2
@@ -30,8 +30,7 @@ jobs:
       run: |
         npm uninstall typescript --no-save
         npm uninstall tslint --no-save
-    - run:  npm install
-    - run:  npm update
+    - run:  npm ci
 
     # Re: https://github.com/actions/setup-node/pull/125
     - name: Register Problem Matcher for TSC
@@ -45,4 +44,4 @@ jobs:
 
     - name: Validate the browser can import TypeScript
       run: gulp test-browser-integration
-    
+

.gitignore

@@ -84,7 +84,6 @@ tests/cases/user/*/**/*.d.ts
 tests/baselines/reference/dt
 .failed-tests
 TEST-results.xml
-package-lock.json
 tests/cases/user/TypeScript-React-Starter/TypeScript-React-Starter
 tests/cases/user/TypeScript-Node-Starter/TypeScript-Node-Starter
 tests/cases/user/TypeScript-React-Native-Starter/TypeScript-React-Native-Starter

.npmrc

@@ -1,9 +1,9 @@
 language: node_js
 
 node_js:
-  - 'node'
+  - '14'
+  - '12'
   - '10'
-  - '8'
 
 env:
   - workerCount=3 timeout=600000
@@ -18,7 +18,7 @@ branches:
 
 install:
   - npm uninstall typescript --no-save
-  - npm install
+  - npm ci
 
 cache:
   directories: