build: update StackBlitz demos to typescript 4.2

- for Angular v12.0.0-next.5 compatibility
- update Angular CLI to v12.0.0-next.5 as well

Author: Splaktar

src/assets/stack-blitz-tests/package.json

@@ -29,8 +29,8 @@
     "zone.js": "^0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "0.1200.0-next.4",
-    "@angular/cli": "^12.0.0-next.4",
+    "@angular-devkit/build-angular": "0.1200.0-next.5",
+    "@angular/cli": "^12.0.0-next.5",
     "@angular/compiler-cli": "^12.0.0-next.0",
     "@angular/language-service": "^12.0.0-next.0",
     "@angular/localize": "^12.0.0-next.0",
@@ -39,6 +39,6 @@
     "codelyzer": "^6.0.1",
     "ts-node": "^8.10.2",
     "tslint": "~6.1.2",
-    "typescript": "~4.1.5"
+    "typescript": "~4.2.3"
   }
 }

src/assets/stack-blitz/package.json

@@ -29,15 +29,15 @@
     "zone.js": "^0.11.4"
   },
   "devDependencies": {
-    "@angular-devkit/build-angular": "^0.1200.0-next.4",
-    "@angular/cli": "^12.0.0-next.4",
+    "@angular-devkit/build-angular": "^0.1200.0-next.5",
+    "@angular/cli": "^12.0.0-next.5",
     "@angular/compiler-cli": "^12.0.0-next.0",
     "@angular/language-service": "^12.0.0-next.0",
     "@angular/localize": "^12.0.0-next.0",
     "@types/node": "^12.20.6",
     "codelyzer": "^6.0.1",
     "ts-node": "^8.10.2",
     "tslint": "~6.1.3",
-    "typescript": "~4.1.5"
+    "typescript": "~4.2.3"
   }
 }