bump minimum version to 5.5.10

ref https://bugs.php.net/bug.php?id=45543

appveyor.yml

@@ -27,10 +27,12 @@ init:
 
 install:
   - cd c:\
-  - appveyor DownloadFile http://windows.php.net/downloads/releases/archives/php-5.5.8-nts-Win32-VC11-x86.zip -FileName php.zip
+  - appveyor DownloadFile http://windows.php.net/downloads/releases/archives/php-5.5.10-nts-Win32-VC11-x86.zip -FileName php.zip
   - 7z x php.zip -oc:\php
   - appveyor DownloadFile https://dl.dropboxusercontent.com/s/euip490d9183jkr/SQLSRV32.cab -FileName sqlsrv.cab
   - 7z x sqlsrv.cab -oc:\php\ext php*_55_nts.dll
+  - cd c:\php\ext
+  - appveyor DownloadFile http://xdebug.org/files/php_xdebug-2.3.3-5.5-vc11-nts.dll
   - cd c:\php
   - copy php.ini-production php.ini
   - echo date.timezone="UTC" >> php.ini
@@ -41,6 +43,7 @@ install:
   - echo extension=php_intl.dll >> php.ini
   - echo extension=php_mbstring.dll >> php.ini
   - echo extension=php_fileinfo.dll >> php.ini
+  - echo extension=php_xdebug-2.3.3-5.5-vc11-nts.dll >> php.ini
   - cd C:\projects\cakephp
   - appveyor DownloadFile https://getcomposer.org/composer.phar
   - php composer.phar install --prefer-dist --no-interaction --ansi --no-progress

composer.json

@@ -18,7 +18,7 @@
         "source": "https://github.com/cakephp/cakephp"
     },
     "require": {
-        "php": ">=5.5.0",
+        "php": ">=5.5.10",
         "ext-intl": "*",
         "ext-mbstring": "*",
         "cakephp/chronos": "*",