un-bump php back to 7.0, because debian stable...

.travis.yml

@@ -1,7 +1,6 @@
 language: php
 php:
-  - 7.1
-  - 7.2
+  - 7.0
 
 sudo: false
 

README.markdown

@@ -29,7 +29,7 @@ check out one of the versioned branches.
 # Requirements
 
 - MySQL/MariaDB 5.1+ (with experimental support for PostgreSQL 9+ and SQLite 3)
-- [Stable PHP](https://en.wikipedia.org/wiki/PHP#Release_history) (7.1+ as of writing)
+- [Stable PHP](https://en.wikipedia.org/wiki/PHP#Release_history) (7.0+ as of writing)
 - GD or ImageMagick
 
 # Installation

composer.json

@@ -23,7 +23,7 @@
 	],
 
 	"require" : {
-		"php" : ">=7.1",
+		"php" : ">=7.0",
 		"ext-pdo": "*",
 
 		"flexihash/flexihash"       : "^2.0.0",

core/sys_config.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", '7.1');// string   minimum supported PHP version
+_d("MIN_PHP_VERSION", '7.0');// string   minimum supported PHP version
 _d("ENABLED_MODS", "imageboard");
 
 /*