Add Image tag cache

See merge request !8

Add an assertion to Container.start() to monitor #11

See merge request !10

Pass environment to docker CLI calls

Closes #16

See merge request !7

Publish and examine Container ports on the host

See merge request !6

This is, depending on the (non-falsey) value type, equivalent to
passing the "--publish-all" or "--publish=" arguments to the `docker
create` command.

Bump .gitlab-ci.pre-commit-run.bash to latest

Closes #9

See merge request !5

Closes #16

Switch to ParamSpec in behave.fixture stub

Closes #1

See merge request !3

This was made possible by the recent support of PEP-612 added to mypy,
and a relevant fix for it.

Add async process interfaces

Closes #8

See merge request !1

Combine develop with main

See merge request !2