build: update to TypeScript 4.2

Author: alan-agius4

modules/common/src/transfer_http.ts

@@ -27,16 +27,19 @@ import { filter, take, tap } from 'rxjs/operators';
 
 export interface TransferHttpResponse {
   body?: any | null;
-  headers?: {[k: string]: string[]};
+  headers?: Record<string, string[]>;
   status?: number;
   statusText?: string;
   url?: string;
 }
 
-function getHeadersMap(headers: HttpHeaders) {
-  const headersMap: Record<string, string[] | null> = {};
+function getHeadersMap(headers: HttpHeaders): Record<string, string[]> {
+  const headersMap: Record<string, string[]> = {};
   for (const key of headers.keys()) {
-    headersMap[key] = headers.getAll(key);
+    const values = headers.getAll(key);
+    if (values !== null) {
+      headersMap[key] = values;
+    }
   }
 
   return headersMap;
@@ -88,7 +91,7 @@ export class TransferHttpCacheInterceptor implements HttpInterceptor {
 
     if (this.transferState.hasKey(storeKey)) {
       // Request found in cache. Respond using it.
-      const response = this.transferState.get(storeKey, {} as TransferHttpResponse);
+      const response = this.transferState.get<TransferHttpResponse>(storeKey, {});
 
       return observableOf(new HttpResponse<any>({
         body: response.body,
@@ -105,7 +108,7 @@ export class TransferHttpCacheInterceptor implements HttpInterceptor {
         .pipe(
           tap((event: HttpEvent<unknown>) => {
             if (event instanceof HttpResponse) {
-              this.transferState.set(storeKey, {
+              this.transferState.set<TransferHttpResponse>(storeKey, {
                 body: event.body,
                 headers: getHeadersMap(event.headers),
                 status: event.status,

package.json

@@ -42,31 +42,31 @@
     "@types/node": "12.12.37"
   },
   "devDependencies": {
-    "@angular-devkit/architect": "^0.1200.0-next.4",
-    "@angular-devkit/build-angular": "^0.1200.0-next.4",
-    "@angular-devkit/core": "^12.0.0-next.4",
-    "@angular-devkit/schematics": "^12.0.0-next.4",
-    "@angular/animations": "^12.0.0-next.4",
-    "@angular/bazel": "^12.0.0-next.4",
-    "@angular/cli": "^12.0.0-next.4",
-    "@angular/common": "^12.0.0-next.4",
-    "@angular/compiler": "^12.0.0-next.4",
-    "@angular/compiler-cli": "^12.0.0-next.4",
-    "@angular/core": "^12.0.0-next.4",
+    "@angular-devkit/architect": "^0.1200.0-next.5",
+    "@angular-devkit/build-angular": "^0.1200.0-next.5",
+    "@angular-devkit/core": "^12.0.0-next.5",
+    "@angular-devkit/schematics": "^12.0.0-next.5",
+    "@angular/animations": "^12.0.0-next.5",
+    "@angular/bazel": "^12.0.0-next.5",
+    "@angular/cli": "^12.0.0-next.5",
+    "@angular/common": "^12.0.0-next.5",
+    "@angular/compiler": "^12.0.0-next.5",
+    "@angular/compiler-cli": "^12.0.0-next.5",
+    "@angular/core": "^12.0.0-next.5",
     "@angular/dev-infra-private": "https://github.com/angular/dev-infra-private-builds.git#1d0dab59344f11d6e6e54c675cde245aae52dbf5",
-    "@angular/platform-browser": "^12.0.0-next.4",
-    "@angular/platform-browser-dynamic": "^12.0.0-next.4",
-    "@angular/platform-server": "^12.0.0-next.4",
-    "@angular/router": "^12.0.0-next.4",
-    "@angular/service-worker": "^12.0.0-next.4",
+    "@angular/platform-browser": "^12.0.0-next.5",
+    "@angular/platform-browser-dynamic": "^12.0.0-next.5",
+    "@angular/platform-server": "^12.0.0-next.5",
+    "@angular/router": "^12.0.0-next.5",
+    "@angular/service-worker": "^12.0.0-next.5",
     "@bazel/bazelisk": "1.7.3",
     "@bazel/buildifier": "3.5.0",
     "@bazel/hide-bazel-files": "1.7.0",
     "@bazel/ibazel": "0.14.0",
     "@bazel/jasmine": "2.3.2",
     "@bazel/typescript": "2.3.2",
     "@hapi/hapi": "^18.4.0",
-    "@schematics/angular": "^12.0.0-next.4",
+    "@schematics/angular": "^12.0.0-next.5",
     "@types/browser-sync": "^2.26.1",
     "@types/express": "~4.17.6",
     "@types/fs-extra": "^9.0.0",
@@ -101,7 +101,7 @@
     "tslib": "~2.1.0",
     "tslint": "^6.0.0",
     "tsutils": "^3.0.0",
-    "typescript": "~4.1.2",
+    "typescript": "~4.2.3",
     "xhr2": "^0.2.0",
     "zone.js": "^0.11.0"
   }