Update PHP versions on AppVeyor

Author: felixfbecker

appveyor.yml

@@ -8,9 +8,9 @@ cache:
 
 environment:
   matrix:
-    - {PHP_VERSION: '7.0.11', VC_VERSION: '14', XDEBUG_VERSION: '2.4.1'}
-    - {PHP_VERSION: '5.6.26', VC_VERSION: '11', XDEBUG_VERSION: '2.4.1'}
-    - {PHP_VERSION: '5.6.26', VC_VERSION: '11', XDEBUG_VERSION: '2.3.3'}
+    - {PHP_VERSION: '7.0.12', VC_VERSION: '14', XDEBUG_VERSION: '2.4.1'}
+    - {PHP_VERSION: '5.6.27', VC_VERSION: '11', XDEBUG_VERSION: '2.4.1'}
+    - {PHP_VERSION: '5.6.27', VC_VERSION: '11', XDEBUG_VERSION: '2.3.3'}
     - {PHP_VERSION: '5.4.45', VC_VERSION:  '9', XDEBUG_VERSION: '2.4.1'}
     - {PHP_VERSION: '5.4.45', VC_VERSION:  '9', XDEBUG_VERSION: '2.3.3'}
     - {PHP_VERSION: '5.4.45', VC_VERSION:  '9', XDEBUG_VERSION: '2.2.3'}  # XDebug version on Vagrant