Release 2.2.0a1

For checking release flow.

release-1.4.0: fix deploy-package job in CI (#3)

* back version into alpha

* test: using Pipfile, not Pipfile.lock

* debug: see dist/ dir

* commit Pipfile.lock created in Linux env to make twine (depends on DBus via jeepney & secretstorage) work

* updates Pipfile.lock generated from Linux env

* re-create Pipfile.lock w/ Python 3.9 / Ubuntu 18.04

* removes build-tools from Pipfile, install via pip3 on-demaind instead