feat(core): drop support for TypeScript 4.0 and 4.1 (angular#41158)

Drops support for TypeScript 4.0 and 4.1 across the repo.
The typings check for 4.1 was kept in order to ensure that we don't break g3.

PR Close angular#41158

Author: crisbeto

integration/BUILD.bazel

@@ -85,12 +85,6 @@ INTEGRATION_TESTS = {
     "service-worker-schema": {},
     "side-effects": {"tags": ["no-ivy-aot"]},
     "terser": {},
-    "typings_test_ts40": {
-        # Special case for `typings_test_ts40` test as we want to pin
-        # `typescript` at version 4.0.x for that test and not link to the
-        # root @npm//typescript package.
-        "pinned_npm_packages": ["typescript"],
-    },
     "typings_test_ts41": {
         # Special case for `typings_test_ts41` test as we want to pin
         # `typescript` at version 4.1.x for that test and not link to the

integration/typings_test_ts40/include-all.ts

@@ -28,7 +28,7 @@
     "@angular/compiler-cli": "0.0.0-PLACEHOLDER",
     "@bazel/typescript": ">=1.0.0",
     "terser": "^4.3.1",
-    "typescript": ">=4.0 <4.3",
+    "typescript": ">=4.2.3 <4.3",
     "rollup": ">=1.20.0",
     "rollup-plugin-commonjs": ">=9.0.0",
     "rollup-plugin-node-resolve": ">=4.2.0",

integration/typings_test_ts40/package.json

@@ -29,7 +29,7 @@
   },
   "peerDependencies": {
     "@angular/compiler": "0.0.0-PLACEHOLDER",
-    "typescript": ">=4.0 <4.3"
+    "typescript": ">=4.2.3 <4.3"
   },
   "engines": {
     "node": ">=10.0"

integration/typings_test_ts40/tsconfig.json

@@ -15,7 +15,7 @@ import {compareVersions} from './diagnostics/typescript_version';
  * Note: this check is disabled in g3, search for
  * `angularCompilerOptions.disableTypeScriptVersionCheck` config param value in g3.
  */
-const MIN_TS_VERSION = '4.0.0';
+const MIN_TS_VERSION = '4.2.3';
 
 /**
  * Supremum of supported TypeScript versions