Release 2.0.0-alpha5 (API Version: 2.0.0-alpha1)

fix: Implict nullable type. Also bump minimum php version to 8.1 and apply php-cs-fixer

Released v2.0.0alpha4.

Released v2.0.0alpha3.

Released v2.0.0alpha2.

Released v2.0.0alpha1.

Released v1.0.10.

Released v1.0.9.

Released Horde_Mapi-1.0.8.

Released Horde_Mapi-1.0.7.

Released Horde_Mapi-1.0.6.