Update Angular to 12

- also update Clarity and ngx-markdown to v12
- align jasmine version w/ newly generated v12 project
- regenerate package-lock.json

Commands used
    npx @angular/cli@11 update @angular/core@11 @angular/cli@11 ngx-markdown@11
    npx ng update @clr/angular@5 @clr/icons@5
    npx @angular/cli@12 update @angular/core@12 @angular/cli@12
    npx ng update @clr/angular@12 @clr/icons@12

After the update, the Angular build process emits a few new warnings:
  - A warning about deep imports (caused by the clarity styles).
    For a workaround see: angular/angular#35615 (comment)

  - Warnings about Clarity's usage of the now deprecated SASS division
    operator. For more information see: vmware-archive/clarity#6331

angular.json

@@ -17,7 +17,6 @@
         "build": {
           "builder": "@angular-devkit/build-angular:browser",
           "options": {
-            "aot": true,
             "outputPath": "dist/hobbyfarm-admin",
             "index": "src/index.html",
             "main": "src/main.ts",
@@ -42,7 +41,13 @@
               "node_modules/@webcomponents/webcomponentsjs/webcomponents-bundle.js",
               "node_modules/ngx-markdown-editor/assets/highlight.js/highlight.min.js",
               "node_modules/ngx-markdown-editor/assets/marked.min.js"
-            ]
+            ],
+            "vendorChunk": true,
+            "extractLicenses": false,
+            "buildOptimizer": false,
+            "sourceMap": true,
+            "optimization": false,
+            "namedChunks": true
           },
           "configurations": {
             "local": {
@@ -63,9 +68,7 @@
               "optimization": true,
               "outputHashing": "all",
               "sourceMap": false,
-              "extractCss": true,
               "namedChunks": false,
-              "aot": true,
               "extractLicenses": true,
               "vendorChunk": false,
               "buildOptimizer": true,
@@ -81,7 +84,8 @@
                 }
               ]
             }
-          }
+          },
+          "defaultConfiguration": ""
         },
         "serve": {
           "builder": "@angular-devkit/build-angular:dev-server",