Merge pull request emacs-php#395 from ejmr/release/v1.18.4

Release v1.18.4

[Version] Bump the version to v1.18.3 due to recent bug fixes

Signed-off-by: Eric James Michael Ritz <[email protected]>

Bump up version and update Changelog

Bump up version and update Changelog

Bump up version

Version 1.17.0

Version 1.16.0

Version 1.15.3

Version 1.15.0

Version 1.14

Bug fixes from some of the most prolific contributors.