Use PSR-12 instead of PSR-2

.styleci.yml

@@ -1 +1 @@
-preset: psr2
+preset: psr12

.travis.yml

@@ -25,7 +25,7 @@ before_script:
   - travis_retry composer update ${COMPOSER_FLAGS} --no-interaction --prefer-dist
 
 script:
-  - vendor/bin/phpcs --standard=psr12 src/
+  - vendor/bin/phpcs --standard=psr12 src/ tests/
   - vendor/bin/phpunit --coverage-text --coverage-clover=coverage.clover
 
 after_script:

CONTRIBUTING.md

@@ -7,7 +7,7 @@ We accept contributions via Pull Requests on [Github](https://github.com/:vendor
 
 ## Pull Requests
 
-- **[PSR-2 Coding Standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-2-coding-style-guide.md)** - Check the code style with ``$ composer check-style`` and fix it with ``$ composer fix-style``.
+- **[PSR-12 Coding Standard](https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-12-extended-coding-style-guide.md)** - Check the code style with ``$ composer check-style`` and fix it with ``$ composer fix-style``.
 
 - **Add tests!** - Your patch won't be accepted if it doesn't have tests.
 

phpcs.xml.dist

@@ -9,6 +9,6 @@
     <arg name="colors" />
     <arg value="s" />
 
-    <!-- Use the PSR2 Standard-->
-    <rule ref="PSR2" />
-</ruleset>
+    <!-- Use the PSR-12 Standard-->
+    <rule ref="PSR12" />
+</ruleset>