chore: Switch pipeline generation test to Actions

Author: nschonni

.github/workflows/dockerfiles.yml

@@ -0,0 +1,11 @@
+name: Check for out of sync YAML pipeline files
+
+on: [pull_request]
+
+jobs:
+  regen:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - run: ./update.sh -t
+      - run: git diff --color --exit-code

.travis.yml

@@ -7,20 +7,11 @@ dist: xenial
 language: minimal
 
 stages:
-  - Test
   - name: Deploy
     if: branch = master AND type IN (push)
 
 jobs:
-  fast_finish: true
-
   include:
-    - stage: Test
-      name: .travis.yml and travis.yml.template consistency
-      script:
-        - ./update.sh -t
-        - git diff --stat --exit-code .travis.yml
-
     - stage: Deploy
       before_script:
         - |