add pre-commit-hook for travis file

CaseyFaist · CaseyFaist · commit 8366d66f5487 · 2019-09-10T12:16:11.000-07:00
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
@@ -3,3 +3,7 @@ repos:
     rev: 1.0.4
     hooks:
     - id: shell-lint
+-   repo: git://github.com/alphagov/verify-travis-pre-commit-hook
+    sha: master
+    hooks:
+    -   id: travis-yml-lint
