Merge pull request #71 from atc0005/update-changelog-for-v0.2.4

Update CHANGELOG for v0.2.4 release

CHANGELOG.md

@@ -26,6 +26,31 @@ The following types of changes will be recorded in this file:
 
 - placeholder
 
+## [v0.2.4] - 2020-09-02
+
+### Added
+
+- `golangci-lint` linters
+  - `unstable` container
+    - `errcheck`
+    - `gocognit`
+    - `gocyclo`
+    - `goerr113`
+
+### Changed
+
+- Go versions
+  - Update `stable` container from `1.15.0` to `1.15.1`
+  - Update `oldstable` container from `1.14.7` to `1.14.8`
+  - Update `unstable` container from `1.15rc2` to `1.15.1`
+    - the plan is to swap out to the next unstable Go version when it becomes
+      available
+
+- `unstable` container
+  - use latest stable Go version (see note above)
+  - update linters (see above)
+  - local copy of `golangci-lint` config file specific to this image variant
+
 ## [v0.2.3] - 2020-08-12
 
 ### Changed
@@ -111,7 +136,8 @@ The following types of changes will be recorded in this file:
       tools that we include in our container images
   - Dockerfile base images
 
-[Unreleased]: https://github.com/atc0005/go-ci/compare/v0.2.3...HEAD
+[Unreleased]: https://github.com/atc0005/go-ci/compare/v0.2.4...HEAD
+[v0.2.4]: https://github.com/atc0005/go-ci/releases/tag/v0.2.4
 [v0.2.3]: https://github.com/atc0005/go-ci/releases/tag/v0.2.3
 [v0.2.2]: https://github.com/atc0005/go-ci/releases/tag/v0.2.2
 [v0.2.1]: https://github.com/atc0005/go-ci/releases/tag/v0.2.1