(maint) sort and canonicalise .sync.yml

.sync.yml

@@ -1,17 +1,14 @@
 ---
-.gitignore:
+".gitignore":
   required:
-    - ---.project
-
-.gitlab-ci.yml:
+  - "---.project"
+".gitlab-ci.yml":
   unmanaged: true
-
-.travis.yml:
+".travis.yml":
   branches:
   - release
   includes:
-    -
-      bundler_args:
+  - bundler_args: 
     dist: trusty
     env: PLATFORMS=deb_puppet5
     rvm: 2.5.1
@@ -25,8 +22,7 @@
     services: docker
     sudo: required
     stage: acceptance
-    -
-      bundler_args:
+  - bundler_args: 
     dist: trusty
     env: PLATFORMS=deb_puppet6
     rvm: 2.5.1
@@ -38,8 +34,7 @@
     script:
     - bundle exec rake litmus:acceptance:parallel
     services: docker
-    -
-      bundler_args:
+  - bundler_args: 
     dist: trusty
     env: PLATFORMS=el_puppet5
     rvm: 2.5.1
@@ -52,8 +47,7 @@
     services: docker
     sudo: required
     stage: acceptance
-    -
-      bundler_args:
+  - bundler_args: 
     dist: trusty
     env: PLATFORMS=el_puppet6
     rvm: 2.5.1
@@ -66,18 +60,15 @@
     services: docker
     sudo: required
     stage: acceptance
-
 appveyor.yml:
   delete: true
-
 Gemfile:
   optional:
-    ':development':
-      - gem: 'github_changelog_generator'
-        git: 'https://github.com/skywinder/github-changelog-generator'
-        ref: '20ee04ba1234e9e83eb2ffb5056e23d641c7a018'
-        condition: "Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('2.2.2')"
-
+    ":development":
+    - gem: github_changelog_generator
+      git: https://github.com/skywinder/github-changelog-generator
+      ref: 20ee04ba1234e9e83eb2ffb5056e23d641c7a018
+      condition: Gem::Version.new(RUBY_VERSION.dup) >= Gem::Version.new('2.2.2')
 spec/spec_helper.rb:
-  mock_with: ':rspec'
+  mock_with: ":rspec"
   coverage_report: true