Merge branch 'py3' into 'master'

.gitignore

.gitlab-ci.yml

pgp_mime_lib/__init__.py

pgp_mime_lib/_compat.py

pgp_mime_lib/rfc3156.py

...te-keys-v1.d/4516CCD58FA4AAD110C1263FF072A27F0D2F23E6.key

...te-keys-v1.d/9A858840ABF0ACFBA624D9AB03BF665BF9472335.key

...te-keys-v1.d/BAF156EE72BCD5DC86C631A2D0C879EE103E2B23.key

...te-keys-v1.d/F847C7872AF397308E1B62CCA66B103D4BD1DD61.key

pgp_mime_lib/test/fixtures/gnupghome/pubring.gpg

pgp_mime_lib/test/fixtures/gnupghome/pubring.gpg~

pgp_mime_lib/test/fixtures/gnupghome/random_seed

pgp_mime_lib/test/fixtures/gnupghome/secring.gpg

pgp_mime_lib/test/fixtures/gnupghome/trustdb.gpg

pgp_mime_lib/test/test_pgp_mime_lib.py

poetry.lock

pyproject.toml

setup.py

tox.ini