Merge pull request emacs-php#604 from emacs-php/release/1.22.2

Bump up version 1.22.2

Bump up version v1.22.1

Merge pull request emacs-php#577 from emacs-php/release/v1.22.0

Release v1.22.0

Merge pull request emacs-php#541 from emacs-php/release/1.21.4

Release 1.21.4

Merge pull request emacs-php#537 from emacs-php/release/v1.21.3

Release v1.21.3

Merge pull request emacs-php#511 from emacs-php/release/v1.21.2

Release v1.21.2

Bump version 1.20.1

Merge pull request emacs-php#495 from emacs-php/release/1.21.0

Release 1.21.0

Merge pull request emacs-php#487 from emacs-php/release/1.20.0

Release 1.20.0

Bump version 1.19.1, last version supporting Emacs 24.3 and earlier

GitHub-Issue: emacs-php#464
emacs-php#464