Fix people pictures and return only single image size

fix character pictures not parsing jikan-me#359 [ci skip]

VoiceActingRoleParser: `role` hotfix

Merge branch 'master' of https://github.com/jikan-me/jikan

fix demographics not returning jikan-me#363

Update Constants.php

Update changelog.md

manga: fix characters jikan-me#362 2.x [ci skip]

Update CharactersAndStaffParser.php

user profile: fix gender & location parsing when it's not set by the …

…user jikan-me#358 3.x