- Use pipenv instead of tox.
- Expand use of pre-commit, many more hooks.
- Run just Bats and doctest for each Python version, pre-commit and
twine check just with Python 3.7.
- Fix doctests, issues found by different checks.
- Use bumpversion instead of relying on a VERSION file.
- Update documentation.
- State AGPL license everywhere (stated MIT in setup.py by accident).
- Format code with Black.
- Test on Python 3.7 in Travis CI.

- Replaced test shell script with Bats tests, update Travis CI and README
  accordingly.
- Removed unused pre-commit hooks.
- Bumped patch version.

- Added JMESPath support, updated docs, TODO list accordingly.
- Added docs to the locally run Tox environments (otherwise when I run
Tox locally this test won't be performed).

- Allow Python 3.2 to fail again (Jinja doesn't test on Python 3.2 so there may be no recurse but to remove testing on Python 3.2).

Unicode strings.
- Fixed combine filter tests.
- Updated TODO list accordingly.

- Updated TODO list.

- Bumped version to 0.3.0.

- Updated tests and documentation.
- Bumped version to 0.2.0.