test: add yamllint

.travis.yml

@@ -1,3 +1,4 @@
+---
 sudo: required
 language: ruby
 
@@ -12,6 +13,7 @@ services:
 before_install:
   - bundle install
   - sudo pip install --upgrade pip
+  - sudo pip install yamllint
   - sudo pip install ansible-lint
   - git clone https://github.com/ansible/galaxy-lint-rules.git
 
@@ -20,6 +22,7 @@ script:
   - kitchen conv fail2ban-debian-9 | grep changed=0
   - kitchen verify fail2ban-debian-9
   - ansible-lint -r galaxy-lint-rules/rules .
+  - yamllint .
 
 notifications:
   webhooks: https://galaxy.ansible.com/api/v1/notifications/

.yamllint

@@ -0,0 +1,12 @@
+---
+extends: default
+
+ignore: |
+  .kitchen/*
+  vendor/
+
+rules:
+  line-length:
+    max: 120
+    level: warning
+  truthy: false

CHANGELOG.md

@@ -5,6 +5,7 @@ Which is based on [Keep A Changelog](http://keepachangelog.com/)
 
 ## [Unreleased]
 * test: add ansible-lint
+* test: add yamllint
 
 ## v1.0.1 (2018-08-28)