chore(deps)!: update to angular 12

[sonallux]

PR Checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[x] Other... Please describe: Update to angular 12

What is the current behavior?

Angular 12 is not supported

Issue Number: #972

What is the new behavior?

• Updated all angular dependencies to Angular 12
• Updated examples to Angular 12
• Bump minimum supported NodeJS version to 12.14.0 because Angular 12 no longer supported NodeJS 10
• Update html-webpack-plugin in example, because the current version is not compatible with webpack 5

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

[nukithelegend]

Webpack should probably be updated too?

[sonallux]

Webpack should probably be updated too?

Webpack is already updated because the dependency to Webpack 5 is contained in the angular package.

[nukithelegend]

Looks good, hoping this can be merged soon

[just-jeb]

LGTM, thanks for the contribution!

[just-jeb]

@all-contributors please add @sonallux for code

[allcontributors]

@just-jeb

@sonallux already contributed before to code