Pytest-cpp

- Fix warnings in pytest 7.0 ([78](https://github.com/pytest-dev/pytest-cpp/issues/78)).

- Fix corner-case issue when no result attribute is found in google test XML output file.

- Added support for `GTEST_SKIP()` skipped message from Google Test `1.11`.

- `pytest-cpp` now supports [Catch2](https://github.com/catchorg/Catch2). Many thanks to [salim-runsafe](https://github.com/salim-runsafe) for the contribution.

- Dropped support for Python 2.7 and 3.5.

- Added support for `GTEST_SKIP()` from Google Test 1.10.

- New `cpp_verbose` configuration option prints the full output of the C++ test runner as the test finishes. Thanks to dajose for contributing.

- Now the output of the C++ test run is shown in its own section during test failure, similar to the `captured out` and `captured err` sections shown by pytest. Thanks to dajose for contributing.