Add Filtering, HealthCheck, Better Tests (#350)

feat: add filtering when choosing merge requests (#346)
feat: Add healthcheck (#345)
refactor: Move to gomock (#349)
feat: Makes the remote of the plugin configurable (#348)

This is a #MINOR release.

.github/CONTRIBUTING.md

@@ -38,6 +38,13 @@ $ go fmt ./...
 $ golangci-lint run
 ```
 
+If you are writing tests and have added something to the Go client, you can re-generate the mocked client like so:
+
+```bash
+$ go install go.uber.org/mock/mockgen@latest # Install the mockgen CLI on your machine
+$ mockgen -source cmd/types.go > cmd/mocks/fake_client.go
+```
+
 For changes to the Lua codebase: We use <a href="https://github.com/JohnnyMorganz/StyLua">stylua</a> for formatting and <a href="https://github.com/mpeterv/luacheck">luacheck</a> for linting. Run these commands in the root of the repository:
 
 ```bash

.github/workflows/lua.yaml

@@ -46,7 +46,7 @@ jobs:
       - name: Install luajit
         uses: leafo/gh-actions-lua@v10
         with:
-          luaVersion: "luajit-2.1.0-beta3"
+          luaVersion: "luajit-openresty"
       - name: Install luarocks
         uses: leafo/gh-actions-luarocks@v4
       - name: Run tests