Merge pull request #5224 from jbampton/lint-yaml

feat(CI): add a GitHub Action to lint the YAML

.github/workflows/codeql-analysis.yml

@@ -43,7 +43,7 @@ jobs:
       #    and modify them (or add more) to build your code if your project
       #    uses a compiled language
 
-    #- run: |
+      # - run: |
       #    make bootstrap
       #    make release
 

.github/workflows/lint.yml

+name: ❄️ Lint
+
+on: [pull_request]
+
+jobs:
+  yamllint:
+    name: 🍶 YAML
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: 🧹 YAML Lint
+        uses: ibiqlik/action-yamllint@v3

.github/workflows/main.yml

@@ -21,4 +21,3 @@ jobs:
         with:
           name: artifacts
           path: ./out/artifacts
-

.gitlab-ci.yml

 ---
 stages:
-- pretest
-- test
+  - pretest
+  - test
 pretest:
   stage: pretest
   image: registry.gitlab.com/dabroz/mruby:gcc47_0.1

.yamllint

+---
+
+extends: default
+
+rules:
+  document-start: disable
+  line-length: disable
+  truthy: false