Quicknotes v0.7.3

Changelog

[0.7.3] 2021-12-03

• Add where to translate into README. PR #71
• Add lint and static-analysis using github workflows.
• Convert database Mappers to QBMapper.
• Fix impossible to change color of a note. Issue #74
• Fix round of modal buttons..
• New Czech translation thanks to Pavel Borecki
• Enable to Nextcloud 23. Issue #75