Merge branch 'master' into migrateMapsAndSets

# Conflicts:
#	src/compiler/checker.ts
#	src/compiler/commandLineParser.ts
#	src/compiler/core.ts
#	src/compiler/moduleNameResolver.ts
#	src/compiler/transformers/declarations.ts
#	src/compiler/tsbuildPublic.ts
#	src/compiler/types.ts
#	src/compiler/utilities.ts
#	src/harness/client.ts
#	src/server/editorServices.ts
#	src/server/typingsCache.ts
#	src/server/utilities.ts
#	src/services/codefixes/convertToAsyncFunction.ts
#	src/services/documentRegistry.ts
#	src/services/importTracker.ts
#	src/services/refactorProvider.ts
#	src/services/refactors/extractSymbol.ts
#	src/testRunner/unittests/programApi.ts
#	src/typingsInstallerCore/typingsInstaller.ts
#	tests/baselines/reference/api/tsserverlibrary.d.ts
#	tests/baselines/reference/api/typescript.d.ts

Author: rbuckton

Diff for: .github/tsc.json

@@ -0,0 +1,18 @@
+{
+  "problemMatcher": [
+      {
+          "owner": "tsc",
+          "pattern": [
+              {
+                  "regexp": "^(?:\\s+\\d+\\>)?([^\\s].*)\\((\\d+),(\\d+)\\)\\s*:\\s+(error|warning|info)\\s+(\\w{1,2}\\d+)\\s*:\\s*(.*)$",
+                  "file": 1,
+                  "line": 2,
+                  "column": 3,
+                  "severity": 4,
+                  "code": 5,
+                  "message": 6
+              }
+          ]
+      }
+  ]
+}

Diff for: .github/workflows/ci.yml

@@ -30,12 +30,19 @@ jobs:
       run: |
         npm uninstall typescript --no-save
         npm uninstall tslint --no-save
-    - name: npm install and test
-      run: |
-        npm install
-        npm update
-        npm test
-        
+    - run:  npm install
+    - run:  npm update
+
+    # Re: https://github.com/actions/setup-node/pull/125
+    - name: Register Problem Matcher for TSC
+      run: echo "##[add-matcher].github/tsc.json"
+
+    - name: Tests
+      run:  npm test -- --no-lint
+
+    - name: Linter
+      run:  npm run lint:ci
+
     - name: Validate the browser can import TypeScript
       run: gulp test-browser-integration
 

Diff for: Gulpfile.js

@@ -350,11 +350,12 @@ const lintFoldEnd = async () => { if (fold.isTravis()) console.log(fold.end("lin
 /** @type { (folder: string) => { (): Promise<any>; displayName?: string } } */
 const eslint = (folder) => async () => {
 
+    const formatter = cmdLineOptions.ci ? "stylish" : "autolinkable-stylish";
     const args = [
         "node_modules/eslint/bin/eslint",
         "--cache",
         "--cache-location", `${folder}/.eslintcache`,
-        "--format", "autolinkable-stylish",
+        "--format", formatter,
         "--rulesdir", "scripts/eslint/built/rules",
         "--ext", ".ts",
     ];
@@ -367,7 +368,7 @@ const eslint = (folder) => async () => {
 
     log(`Linting: ${args.join(" ")}`);
     return exec(process.execPath, args);
-}
+};
 
 const lintScripts = eslint("scripts");
 lintScripts.displayName = "lint-scripts";