* Added support for PHP 8
* Added support for GnuPG 2.1+
* Added argument info for all functions and methods (reflection support)
* Added new function `gnupg_getengineinfo`
* Added new function `gnupg_geterrorinfo`
* Added init array argument for setting home dir and gpg binary file name
* Added additional fields to `gnupg_keyinfo` returned array
* Added parameter to `gnupg_keyinfo` to use `secret_only`
* Fixed `gnupg_deletekey` to use boolean for `allow_secret` parameter