Release v2.0.0

Require Node.js 12+ to execute the creator (#767)
Add common.title property back into io-package.json (#796)
Drop support for Travis CI (#797) · Migration guide
Use dependency caching on Github Actions (#809) · Migration guide
Restore compatibility with TypeScript 4.4+ (#808) · Migration guide
Fix ESLint auto-formatting to generate correct quotes in React (#812)
Allow exitCode 11 by default for schedule adapters during testing (#811)
Updated .gitignore, added .eslintignore file (#813) · Migration guide
Remove .npmignore blacklist, use files whitelist in package.json instead (#816) · Migration guide
Updated alt texts of ioBroker badges in readme (#722)
Shared testing workflows (#822) · Migration guide
Readme for adapter created using portal reflects the fact that the repository already exists (#788)
The default branch can now be chosen, default is "main", but it is possible to change to "master" (#631)