Making the plugin CakePHP 3.6 compatible

Author: burzum

.editorconfig

@@ -4,7 +4,7 @@
 root = true
 
 [*]
-indent_style = spaces
+indent_style = space
 end_of_line = lf
 insert_final_newline = true
 trim_trailing_whitespace = true

.gitignore

@@ -5,3 +5,4 @@ Icon
 
 Vendor/*
 /.idea
+/coverage/*

.travis.yml

@@ -1,17 +1,14 @@
 language: php
 
 php:
-  - 5.6
   - 7.0
+  - 7.1
 
 matrix:
-  allow_failures:
-    - php: 7.0
-
   fast_finish: true
 
   include:
-    - php: 5.6
+    - php: 7.1
       env:
         - COVERALLS=1
 

README.md

@@ -13,7 +13,8 @@ The plugin includes a trait, a view helper, a behavior and a shell to clean your
 
 ---
 
-**For CakePHP 2.x use the 1.x version or branch!**
+* For **CakePHP 2.x** use the 1.x version or branch.
+* For **CakePHP <=3.5** use the 2.0 version or branch.
 
 Documentation
 -------------
@@ -25,13 +26,6 @@ Support
 
 For support and feature request, please visit the [Support Site](https://github.com/burzum/cakephp-html-purifier/issues).
 
-Branch strategy
--------------
-
-* The **master** branch holds the `STABLE` latest version of the plugin.
-* The **2.0** branch is `UNSTABLE` and used to test new features before releasing them.
-* Only **hot fixes** are accepted against the master branch.
-
 Contributing to this Plugin
 ---------------------------
 
@@ -43,6 +37,6 @@ Please feel free to contribute to the plugin with new issues, requests, unit tes
 License
 -------
 
-Copyright 2012 - 2016 Florian Krämer
+Copyright 2012 - 2018 Florian Krämer
 
 Licensed under the [MIT](http://www.opensource.org/licenses/mit-license.php) License. Redistributions of the source code included in this repository must retain the copyright notice found in each file.

composer.json

@@ -13,11 +13,12 @@
 	],
 	"minimum-stability": "stable",
 	"require": {
-		"cakephp/cakephp": "3.*",
-		"ezyang/htmlpurifier": "*"
+		"cakephp/cakephp": "^3.6",
+		"ezyang/htmlpurifier": "*",
+		"cakephp/cakephp-codesniffer": "^3.0"
 	},
 	"require-dev": {
-		"phpunit/phpunit": "5.*"
+		"phpunit/phpunit": "6.*"
 	},
 	"autoload": {
 		"psr-4": {