Add phpcs ruleset and update Travis configuration to include PHP 7.2

.travis.yml

@@ -16,6 +16,8 @@ matrix:
       env: DB=MYSQL PHPUNIT_TEST=1
     - php: 7.1
       env: DB=MYSQL PHPUNIT_COVERAGE_TEST=1
+    - php: 7.2
+      env: DB=MYSQL PHPUNIT_TEST=1
 
 before_script:
   # Init PHP
@@ -31,7 +33,7 @@ before_script:
 script:
   - if [[ $PHPUNIT_TEST ]]; then vendor/bin/phpunit tests/; fi
   - if [[ $PHPUNIT_COVERAGE_TEST ]]; then phpdbg -qrr vendor/bin/phpunit --coverage-clover=coverage.xml; fi
-  - if [[ $PHPCS_TEST ]]; then vendor/bin/phpcs --standard=vendor/silverstripe/framework/phpcs.xml.dist src/ tests/ ; fi
+  - if [[ $PHPCS_TEST ]]; then vendor/bin/phpcs src/ tests/ ; fi
 
 after_success:
   - if [[ $PHPUNIT_COVERAGE_TEST ]]; then bash <(curl -s https://codecov.io/bash) -f coverage.xml; fi

phpcs.xml.dist

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ruleset name="SilverStripe">
+    <description>CodeSniffer ruleset for SilverStripe coding conventions.</description>
+
+    <!-- base rules are PSR-2 -->
+    <rule ref="PSR2" >
+        <!-- Current exclusions -->
+        <exclude name="PSR1.Methods.CamelCapsMethodName.NotCamelCaps" />
+    </rule>
+</ruleset>