Upgrade to Angular 12

[MadLamprey]

Summary:

This pull request addresses some outdated packages in our application.

Fixes #266

Changes Made:

• Upgrade to Angular 12 using `ng update`
  • See: https://update.angular.io/?l=3&v=11.0-12.0
  • All changes mentioned have been reviewed

Proposed Commit Message:

Upgrade to Angular 12

Some of our packages are old and outdated. We should actively maintain 
and keep these packages up-to-date so it is easier to maintain in the 
future.

Let's upgrade to Angular 12 to keep our packages up-to-date.

[Arif-Khalid]

System

OS: Windows 11 23H2
Browser: Opera GX
Browser Version: LVL5 (core: 106.0.4998.76)
Local Angular Version: 12.2.17
Node Version: 16.10.0
npm version: 7.5.6

Actions Run

npm install
npm run ng:serve:web

Tested Features

Switching between repositories
Hiding labels
Filtering by labels
Filtering by type
Filtering by status
Filtering by milestones
Filtering by title via search bar
Sorting by ID, title and date updated
Direct access to watching repository via url

No bugs found

[Arif-Khalid]

System

OS: Windows 11 23H2
Browser: Chrome
Browser Version: 121.0.6167.185 (Official Build) (64-bit)
Local Angular Version: 12.2.17
Node Version: 16.10.0
npm version: 7.5.6

Actions Run
npm install
npm run ng:serve:web

Tested Features

Switching between repositories
Hiding labels
Filtering by labels
Filtering by type
Filtering by status
Filtering by milestones
Filtering by title via search bar
Sorting by ID, title and date updated
Direct access to watching repository via url

No bugs found