Add GitHub workflows for test and release

Also:
 - Fix test scenario that failed due
   to fuzzy completions
 - Bump Cucumber

Fixes #36

CHANGELOG.md

@@ -0,0 +1,61 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and
+this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [2.0.0] - upcoming
+
+### Breaking
+
+- Drop (explicit) support for Fish 2
+
+### Features
+
+- Compatibility with SDKMAN! 5.9.2
+  - Completions for `env`, `home`, `flush` (issue #35)
+  - Correct behaviour of `env clear`. 
+  - TODO: autoenv (issue #38)
+  - TODO: custom SDKMAN! install path (issue #34)
+- Compatibility with fisher 4 (PR #37, #39)
+
+## [1.4.0] - 2019-11-06
+
+### Features
+
+- Compatibility with macOS (issue #29)
+
+## [1.3.0] - 2019-11-05
+
+### Features
+
+- Install SDKMAN! if missing (issue #26)
+
+## [1.2.0] - 2019-07-31
+
+### Features
+
+- Compatibility with fish 3 (issue #27)
+
+## [1.1.2] - 2019-01-06
+
+### Fixes
+
+-  Re-initialize if user has changed (issue #25)
+
+## [1.1.1] - 2018-11-09
+
+### Fixes
+
+- Set `_HOME` environment variables (issue #24)
+
+## [1.1.0] - 2018-10-08
+
+### Features
+
+- Compatibility with fisher 3 (PR #22)
+
+## [1.0.0] - 2018-07-21
+
+Initial release.