add a changelog

CHANGELOG.md

@@ -0,0 +1,28 @@
+# Change Log
+
+## [Unreleased](https://github.com/sensu/sensu-go-has-contact-filter/tree/HEAD)
+
+[Full Changelog](https://github.com/sensu/sensu-go-has-contact-filter/compare/0.1.2...HEAD)
+
+- `has_contact` function now disregards entity contacts when any check contacts are defined.
+- Added `no_contacts` function. Use this when defining a "default" handler which is used when no contacts are defined.
+- The readme is now more descriptive and prescriptive. 🤩
+- Added MIT license and this changelog! ✍️
+
+## [0.1.2](https://github.com/sensu/sensu-go-has-contact-filter/tree/0.1.2) (2019-06-18)
+[Full Changelog](https://github.com/sensu/sensu-go-has-contact-filter/compare/0.1.1...0.1.2)
+
+- No functional changes.
+- Fixed release naming in build.sh. 🙃
+
+## [0.1.1](https://github.com/sensu/sensu-go-has-contact-filter/tree/0.1.1) (2019-06-18)
+[Full Changelog](https://github.com/sensu/sensu-go-has-contact-filter/compare/0.1.0...0.1.1)
+
+- No functional changes.
+- Updated travis-ci configuration to use build.sh in deploy phase.
+
+## [0.1.0](https://github.com/sensu/sensu-go-has-contact-filter/tree/0.1.0) (2019-06-18)
+
+- First release! 🎉
+
+\* *This Change Log was automatically generated by [github_changelog_generator](https://github.com/skywinder/Github-Changelog-Generator)*