v2.1.2: Change GPG key used to sign PHAR

What's Changed

• Change GPG key used to sign PHAR by @Aeliot-Tm in #46
• Config automated registration of issues depends on TODO-comments in code of the project by @Aeliot-Tm in #43, #44, #47, #48, #49, #50

Full Changelog: v2.1.1...v2.1.2