docs: user info. updated & markdown lint added

Author: AndrewJBateman

.markdownlint.json

@@ -0,0 +1,6 @@
+{
+  "MD010": false,
+  "MD007": false,
+  "MD013": false,
+  "MD004": false
+}

README.md

@@ -32,9 +32,9 @@
 
 ## :signal_strength: Technologies
 
-* [Angular v12](https://angular.io/)
-* [Firebase v8](https://firebase.google.com/)
-* [Reactive Extensions for Javascript -RxJS v6](https://angular.io/guide/rx-library) library used for reactive programming using the observable type.
+* [Angular v13](https://angular.io/)
+* [Firebase v9](https://firebase.google.com/)
+* [Reactive Extensions for Javascript -RxJS v7](https://angular.io/guide/rx-library) library used for reactive programming using the observable type.
 * [RxJS SwitchMap](https://www.learnrxjs.io/learn-rxjs/operators/transformation/switchmap) On each emission **the previous inner observable is cancelled and the new observable is subscribed**; switch to a new observable. Only one subscription at a time - seems ideal for login applications
 
 ## :floppy_disk: Setup
@@ -86,7 +86,6 @@ export class UserService {
 
 * user login using google id or password, can be viewed on Firebase Console.
 * User privileges can be revoked from the Firebase console.
-* Updated may 2021.
 
 ## :clipboard: Status & To-Do List