2.0.0-RC1

fix(timezone): rename temp files with archive extension for PharData
chore: Update workflow dependency

2.0.0-beta1

chore: Update metadata, bump PHP version requirement, make archive_tar optional
docs: UPGRADING and README
refactor: Use PSR-4 HordeString
refactor: PSR-4 and typesafe re-implementation
style: php-cs-fixer
feat: Prefer phar extension over archive/tar and guard against incompatible archive/tar versions
Modernize unit tests. However 4 test cases are failing.
Development mode for Timezone-2.0.0alpha5