* chore: Switch to Node 20 + Vitest
* chore: migrate to vitest mock functions
* chore: code style (switch to prettier)
* test: re-enable long-running test
Seems the switch to Node 20 and Vitest has vastly improved the code's and / or the test's runtime!
see #1193
* chore: code style
* chore: fix failing tests
* Updated Documentation in README.md
* Update contribution guidelines to state usage of Prettier
* fix: set prettier printWidth back to 80
* chore: apply updated code style automatically
* fix: set prettier line endings to lf again
* chore: apply updated code style automatically
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Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>
* feat: Add check number case
* style: Fix formatting
* fix: Remove number check part
* feat: Create isPalindromeIntegerNumber
* test: Add minus number case
