Cpython-lldb

This releases contains no functional changes. Its purpose is to verify the new release workflow via GitHub Actions.

Commits
- 1da23ce: Use python:3.10 Docker image for testing (Roman Podoliaka) [51](https://github.com/malor/cpython-lldb/pull/51)

Functional changes

* `py-bt` now traverses the call stack starting from the selected frame and up rather than from the newest frame

* Added pretty-printing support for the following types:
- frozensets
- collections.defaultdict
- collections.UserDict
- collections.OrderedDict
- collections.Counter
- collections.UserList
- collections.UserString

* Add type summaries for the following built-in CPython structs:
- PyLongObject
- PyFloatObject
- PyBytesObject
- PyUnicodeObject
- PyListObject
- PyTupleObject
- PySetObject
- PyDictObject
- defdictobject

Non-functional changes

* Tests are now executed in parallel via pytest-xdist
* Added a test for py-bt triggered on a mixed Python/C-API call stack
* Switched to using of GitHub Actions instead of Travis CI