Add --clear-cache option

Add release workflow

Bump pylint from 2.4.3 to 2.4.4

Bumps [pylint](https://github.com/PyCQA/pylint) from 2.4.3 to 2.4.4.
- [Release notes](https://github.com/PyCQA/pylint/releases)
- [Changelog](https://github.com/PyCQA/pylint/blob/master/ChangeLog)
- [Commits](https://github.com/PyCQA/pylint/compare/pylint-2.4.3...pylint-2.4.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Update PIP when a new version is tagged

Add JSON output

Bump numpy from 1.17.3 to 1.17.4

Bumps [numpy](https://github.com/numpy/numpy) from 1.17.3 to 1.17.4.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://github.com/numpy/numpy/blob/master/doc/HOWTO_RELEASE.rst.txt)
- [Commits](https://github.com/numpy/numpy/compare/v1.17.3...v1.17.4)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bumps [skyfield](https://github.com/brandon-rhodes/python-skyfield) from 1.13 to 1.14.
- [Release notes](https://github.com/brandon-rhodes/python-skyfield/releases)
- [Changelog](https://github.com/skyfielders/python-skyfield/blob/master/CHANGELOG.rst)
- [Commits](https://github.com/brandon-rhodes/python-skyfield/compare/1.13...1.14)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Bump pylintfileheader from 0.0.2 to 0.1.0

Bumps [pylintfileheader](https://github.com/HaaLeo/pylint-file-header) from 0.0.2 to 0.1.0.
- [Release notes](https://github.com/HaaLeo/pylint-file-header/releases)
- [Changelog](https://github.com/HaaLeo/pylint-file-header/blob/master/CHANGELOG.md)
- [Commits](https://github.com/HaaLeo/pylint-file-header/compare/v0.0.2...v0.1.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>