Run the test suite with GitHub actions.

[mathiasertl]

Run the test suite using GitHub actions.

Other minor improvements:

• Use UV_PYTHON_PREFERENCE=only-system (as recommended in uv docs, brings a minor speedup).
• Fix a test case (OpenSSL now requires -CAFile for verification).
• Add Dockerfile to test running on different distributions.
• Remove .travis.yml file (no longer needed).

Note that the Dockerfile can be used to indeed verify that OpenSSL 3.0.10 and oscrypto have a problem:

On Ubuntu 24.04:

$ docker build --build-arg IMAGE=ubuntu:24.04 -t test .
...
$ docker run --rm -it test 
OpenSSL 3.0.13 30 Jan 2024 (Library: OpenSSL 3.0.13 30 Jan 2024)
$ docker run --rm -it test 
...
.venv/lib/python3.12/site-packages/oscrypto/_openssl/_libcrypto_cffi.py:44: LibraryNotFoundError
===================================================================================================================== short test summary info ======================================================================================================================
FAILED tests/test_public_key_external.py::ExternalPublicKeyTests::test_rsa - oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
FAILED tests/test_public_key_external.py::ExternalPublicKeyTests::test_terrible_hybrid_file_encryption_app - oscrypto.errors.LibraryNotFoundError: Error detecting the version of libcrypto
== 2 failed, 82 passed, 5 skipped, 1 xfailed in 0.80s ==

While on Ubuntu 22.04:

# docker build --build-arg IMAGE=ubuntu:22.04 -t test .
...
$ docker run --rm -it test openssl version
OpenSSL 3.0.2 15 Mar 2022 (Library: OpenSSL 3.0.2 15 Mar 2022)
$ docker run --rm -it test 
== 84 passed, 5 skipped, 1 xfailed in 0.80s ==

[mathiasertl]

Independently of the contents, can we switch the default merge behavior to rebase and merge? History already has a lot of pointless merge commits. Obviously a matter of preference, but let me know what you think.

[kislyuk]

Thanks for the reminder - I have disabled the merge option, only squash and rebase merging are available.