in preparation for a release

Merge remote-tracking branch 'h2database/master'

# Conflicts:
#	h2/src/docsrc/html/changelog.html

Merge pull request #4076 from andreitokar/release-2.3.230

in preparation for release

in preparation of 2.2.224 release

in preparation for release

changelog adjustment

release preparation - another minor adjustment

Merge pull request #3482 from andreitokar/release-prep

Release prep

Merge remote-tracking branch 'h2database/master'

# Conflicts:
#	h2/src/docsrc/html/changelog.html

Release 2.0.206 preparation