mvnvm 0.1 (new formula)

Closes #34152.
gifify 2.0

Closes #34404.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>
bottle: use --root-url instead of --root_url
test-bot: more support for bottling taps.
pypy: update 2.4.0_2 bottle.