Composer unset platform.php on AppVeyor

Author: WyriHaximus

appveyor.yml

@@ -44,6 +44,7 @@ install:
     - IF %PHP%==1 echo @php %%~dp0composer.phar %%* > composer.bat
     - appveyor-retry appveyor DownloadFile https://getcomposer.org/composer.phar
     - cd c:\projects\php-project-workspace
+    - composer config --unset platform.php
     - IF %dependencies%==lowest appveyor-retry composer update --prefer-lowest --no-progress --profile -n
     - IF %dependencies%==current appveyor-retry composer install --no-progress --profile
     - IF %dependencies%==highest appveyor-retry composer update --no-progress --profile -n