feat: allow open menu if max items limit is reached (ng-select#2054)

feat(cicd): updates GitHub actions node version to 14 (ng-select#2085)

1. Angular 14 does not support Node 12 or below. This commit updates Github actions node version to Node 14

fix: include themes as part of the exports (ng-select#2007)

chore(deps): bump nth-check from 2.0.0 to 2.0.1 (ng-select#2003)

Bumps [nth-check](https://github.com/fb55/nth-check) from 2.0.0 to 2.0.1.
- [Release notes](https://github.com/fb55/nth-check/releases)
- [Commits](fb55/nth-check@v2.0.0...v2.0.1)

---
updated-dependencies:
- dependency-name: nth-check
  dependency-type: indirect
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

chore: fix release build (ng-select#2004)

feat: add 'left' and 'right' options to dropdownPosition (ng-select#1990

)

* feat: add 'left' and 'right' options to dropdownPosition

feat: add clearSearchOnAdd to NgSelectConfig (ng-select#1975)

feat(styles): added variables in default theme to allow customization… (

ng-select#1892)

perf: reduce change detection cycles by listening the `mousedown` in …

…the root zone (ng-select#1929)

This PR reduces change detection cycles for the `ng-dropdown-panel` by replacing
`HostListener` with `fromEvent` outside of the zone. Calling `preventDefault()`
on the event doesn't require Angular to run `ApplicationRef.tick()`. Note that the
`HostListener` wraps the actual listener under the hood into the internal Angular function
which runs `markDirty()` before running the actual listener (the decorated class method).

fix: add 1 pixel for reliable triggering scrollToEnd (ng-select#1877)