Upgrade Angular 13 (#32)

* Upgrade Angular 13

* Consistency improvements

Author: lumburovskalina

.gitignore

@@ -32,6 +32,7 @@ speed-measure-plugin*.json
 .history/*
 
 # misc
+/.angular/cache
 /.sass-cache
 /connect.lock
 /coverage
@@ -44,5 +45,3 @@ testem.log
 # System Files
 .DS_Store
 Thumbs.db
-
-.angular/

angular.json

@@ -127,17 +127,6 @@
             "scripts": []
           }
         },
-        "lint": {
-          "builder": "@angular-devkit/build-angular:tslint",
-          "options": {
-            "tsConfig": [
-              "tsconfig.app.json",
-              "tsconfig.spec.json",
-              "e2e/tsconfig.json"
-            ],
-            "exclude": ["**/node_modules/**"]
-          }
-        },
         "e2e": {
           "builder": "@angular-devkit/build-angular:protractor",
           "options": {