chore: update to 21.12.1 (solidnerd#293)

Merge pull request solidnerd#291 from solidnerd/update-to-21-12

chore: bump to 21.12

docs: update version to 21.11.3

upgrade to 0.31.6 (solidnerd#227)

Co-authored-by: JHenneberg <[email protected]>

chore(deps): update mysql docker tag to v5.7.33 (solidnerd#225)

Co-authored-by: Renovate Bot <[email protected]>

upgrade to 0.31.3 (solidnerd#223)

Co-authored-by: solidnerd <[email protected]>

upgrade to 0.30.7 (solidnerd#222)

feat: upgrade bookstack to 0.30.4 (solidnerd#217)

fix: set composer version to 1.10.16 (solidnerd#215)