* refactor: remove usage of global variables in abbrevs.py
* chore: add flake8-mutable to prevent mutable defaults
* fix: abbrevs expand test
* refactor: add xonsh session singleton
* refactor: fix circular errors when using xonshSession as singleton
* refactor: remove black magicked builtin attributes
* style: black format tests as well
* refactor: update tests to use xonsh-session singleton
* refactor: update abbrevs to not use builtins
* test: remove DummyCommandsCache and patch orig class
* fix: failing test_command_completers
* test: use monkeypatch to update xession fixture
* fix: failing test_pipelines
* fix: failing test_main
* chore: run test suit as single invocation
* test: fix tests/test_xonsh.xsh
* refactor: remove builtins from docs/conf.py
* fix: mypy error in jobs
* fix: test error from test_main
* test: close xession error in test_command_completers
* chore: use pytest-cov for reporting coverage
this will include subprocess calls, and will increase coverage
* style:
* fix: update failing commands-cache tests
in some cases, the thread updates the binaries faster than the next call
* chore: upgrade black to 21.5b0
* chore: upgrade mypy to 0.812 version
* fix: handle corrupt commands-cache file
* fix: parser-table output dir. this should be same as the defaults
* fix: flake8 error
* Delete codecov.yml
codecov got hacked, rather badly, and we aren't going to send them anything ever again
* Remove codecov badge and remove from requirements
* chore (ci): improve elm job speed by caching
* chore (ci): update ci generator script to be run from any dir
* chore: update pre-commit to use local black binary
* chore: mypy config skip amalgam generated modules
* chore: run-tests.xsh parameterisation
use argparser to make this file a cli
* feat: use requirements.txt during CI
* feat: run black/flake8/mypy during ci from pip-env
* chore: mypy version 0.790 fix
since the loose pinning on mypy version causes new PRs to fail
* refactor: update github actions template
remove poetry/environment.yml files
* delete package ptk; rename ptk2 to ptk_shell.; leave ptk2 as alias for ptk_shell.
* SHELL_TYPE "prompt_toolkit" only; remove ptk1 specific behavior.
* Doc updates: eliminate reference to prompt-toolkit < 2.0
* update requirements files ptk>=2; test shell_style="none"
* fix ptk2 stub per code review
* Add ptk2 to list of packages to install.
