rebase: bump github.com/onsi/gomega from 1.17.0 to 1.18.0

Bumps [github.com/onsi/gomega](https://github.com/onsi/gomega) from 1.17.0 to 1.18.0.
- [Release notes](https://github.com/onsi/gomega/releases)
- [Changelog](https://github.com/onsi/gomega/blob/master/CHANGELOG.md)
- [Commits](https://github.com/onsi/gomega/compare/v1.17.0...v1.18.0)

---
updated-dependencies:
- dependency-name: github.com/onsi/gomega
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

vendor/github.com/onsi/gomega/CHANGELOG.md

@@ -1,3 +1,20 @@
+## 1.18.0
+
+## Features
+- Docs now live on the master branch in the docs folder which will make for easier PRs.  The docs also use Ginkgo 2.0's new docs html/css/js. [2570272]
+- New HaveValue matcher can handle actuals that are either values (in which case they are passed on unscathed) or pointers (in which case they are indirected).  [Docs here.](https://onsi.github.io/gomega/#working-with-values) (#485) [bdc087c]
+- Gmeasure has been declared GA [360db9d]
+
+## Fixes
+- Gomega now uses ioutil for Go 1.15 and lower (#492) - official support is only for the most recent two major versions of Go but this will unblock users who need to stay on older unsupported versions of Go. [c29c1c0]
+
+## Maintenace
+- Remove Travis workflow (#491) [72e6040]
+- Upgrade to Ginkgo 2.0.0 GA [f383637]
+- chore: fix description of HaveField matcher (#487) [2b4b2c0]
+- use tools.go to ensure Ginkgo cli dependencies are included [f58a52b]
+- remove dockerfile and simplify github actions to match ginkgo's actions [3f8160d]
+
 ## 1.17.0
 
 ### Features