doc: update Python version requirement to 3.9 in README

Signed-off-by: Frost Ming <[email protected]>

Bump version to v2.2.0 (#238)

Signed-off-by: Frost Ming <[email protected]>

chore: bump version to 2.1.4

Signed-off-by: Frost Ming <[email protected]>

chore: Update pdm.lock (#220)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

chore: bump version to 2.1.2

Signed-off-by: Frost Ming <[email protected]>

chore: bump version to 2.1.1

Signed-off-by: Frost Ming <[email protected]>

chore: bump version to 2.1.0

Signed-off-by: Frost Ming <[email protected]>

fix(ci): revert workflow change

Signed-off-by: Frost Ming <[email protected]>

chore: release 2.0.1

Signed-off-by: Frost Ming <[email protected]>