Add require-dev, minimum stability

Author: wilr

composer.json

@@ -13,6 +13,9 @@
     "require": {
         "silverstripe/framework": "^4"
     },
+    "require-dev": {
+        "phpunit/PHPUnit": "^5.7"
+    },
     "autoload": {
         "psr-4": {
             "FullscreenInteractive\\SilverStripe\\": "src/"
@@ -26,5 +29,7 @@
     "scripts": {
       "lint": "phpcs src/ tests/",
       "lint-clean": "phpcbf src/ tests/"
-    }
+    },
+    "minimum-stability": "dev",
+    "prefer-stable": true
 }

phpcs.xml.dist

@@ -0,0 +1,12 @@
+<?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" />
+        <exclude name="Squiz.Classes.ValidClassName.NotCamelCaps" />
+        <exclude name="Generic.Files.LineLength.TooLong" />
+    </rule>
+</ruleset>