chore: drop python 3.8 support, prep for release (#381)

chore: prep 0.14.2 (#350)

prep 0.14.1

Signed-off-by: William Woodruff <william@yossarian.net>

prep 0.14.0

cachecontrol: 0.13.1 (#315)

cachecontrol: 0.13.1rc0

chore: bump version to 0.12.14

Signed-off-by: Frost Ming <me@frostming.com>

chore: release 0.12.13

Signed-off-by: Frost Ming <me@frostming.com>

chore: Release 0.13.0 (#307)

Bump version: 0.12.11 → 0.12.12