PHP bump in travis and sys-config too

.travis.yml

@@ -1,7 +1,7 @@
 language: php
 php:
-  - 7.0
   - 7.1
+  - 7.2
 
 sudo: false
 

core/sys_config.inc.php

@@ -40,7 +40,7 @@ _d("TIMEZONE", null);        // string   timezone
 _d("CORE_EXTS", "bbcode,user,mail,upload,image,view,handle_pixel,ext_manager,setup,upgrade,handle_404,comment,tag_list,index,tag_edit,alias_editor"); // extensions to always enable
 _d("EXTRA_EXTS", "");        // string   optional extra extensions
 _d("BASE_URL", null);        // string   force a specific base URL (default is auto-detect)
-_d("MIN_PHP_VERSION", '7.0');// string   minium supported PHP version
+_d("MIN_PHP_VERSION", '7.1');// string   minium supported PHP version
 
 /*
  * Calculated settings - you should never need to change these