Change required redmine version to 3.1.0 or higher

Author: onozaty

README.ja.md

@@ -127,7 +127,8 @@ ViewCustomize = {
 
 ## サポートバージョン
 
-* Redmine 2.0.x 以降
+* 最新バージョン : Redmine 3.1.x 以降
+* 1.2.2 : Redmine 2.0.x から 3.4.x
 
 ## ライセンス
 

README.md

@@ -133,8 +133,8 @@ For example, to access the user's API key is `ViewCustomize.context.user.apiKey`
 
 ## Supported versions
 
-* Current version : Redmine 3.0.x or later
-* 1.2.2 : Redmine 2.0.x or later
+* Current version : Redmine 3.1.x or later
+* 1.2.2 : Redmine 2.0.x - 3.4.x
 
 ## License
 

init.rb

@@ -1,7 +1,7 @@
 require_dependency 'view_customize/view_hook'
 
 Redmine::Plugin.register :view_customize do
-  requires_redmine :version_or_higher => '3.0.0'
+  requires_redmine :version_or_higher => '3.1.0'
   name 'View Customize plugin'
   author 'onozaty'
   description 'View Customize plugin for Redmine'