Shtab

- :tada: add `zsh` subcommand support (73)
- :hammer: fix docs build (72)
- :hammer_and_wrench: check annotations pre-commit

- :tada: add basic type hints support (60 <- 59)
- :birthday: drop py2.7 support
- :hammer_and_wrench: update pre-commit hooks
- :books: misc docs updates (64)
+ migrate [README](https://github.com/iterative/shtab#readme) to [docs site](https://docs.iterative.ai/shtab) (#52)
+ add FAQs (32, 62)
+ add code headers
+ fix tabs

- :hammer: remove unneeded shebang (61)

- :hammer: skip hidden arguments on `tcsh` (58)
- :hammer: fix & update `examples/customcomplete.py`
- :books: update docs

- :tada: add `tcsh` completion & docs (57 <- 56)
- :tada: add `--verbose` flag
- :books: update `examples/customcomplete.py`
- :hammer_and_wrench: misc linter & build framework updates

- :books: add documentation website https://docs.iterative.ai/shtab (#51)
- :books: fix subparsers example (54)
- :hammer_and_wrench: use `string.Template` (53)
- :hammer_and_wrench: fix py2.7 tests (53)
- :hammer_and_wrench: misc test framework updates (50, 53)