Add new release, fix flatpak linter errors

fix: appstream-missing-developer-name lint error

fix appdata

Merge pull request xou816#608 from xou816/development

0.4.0

Merge pull request xou816#507 from xou816/development

0.3.3

Merge pull request xou816#503 from xou816/development

0.3.2

fix typo

Merge pull request xou816#426 from xou816/release-0.3

Release 0.3

version 0.2.2

version 0.2.1