Add support for Silverstripe 6

Author: axllent

.gitattributes

@@ -7,15 +7,13 @@ optimised, provided you have the correct binaries installed (see "Installation"
 The module overrides the default `FlysystemAssetStore` to and transparently optimises
 the image before adding the image to the store.
 
-
 ## Requirements
 
-- `silverstripe/framework` ^4.0 || ^5.0
-- `silverstripe/assets` ^1.10 || ^2.0
+- `silverstripe/framework` ^4.0 || ^5.0 || ^6.0
+- `silverstripe/assets` ^1.10 || ^2.0 || ^3.0
 - [spatie/image-optimizer](https://github.com/spatie/image-optimizer) - automatically installed
 - JpegOptim, Optipng, Pngquant 2 & Gifsicle binaries (see below)
 
-
 ## Optimisation tools
 
 The module uses [spatie/image-optimizer](https://github.com/spatie/image-optimizer) and will use the
@@ -26,7 +24,6 @@ following optimisers if they are both present and in your default path on your s
 - [Pngquant 2](https://pngquant.org/)
 - [Gifsicle](http://www.lcdf.org/gifsicle/)
 
-
 ## Installation
 
 ```shell
@@ -39,14 +36,12 @@ composer require axllent/silverstripe-image-optimiser
 sudo apt-get install jpegoptim optipng pngquant gifsicle
 ```
 
-
 ### Installing the utilities on Alpine Linux:
 
 ```bash
 apk add jpegoptim optipng pngquant gifsicle
 ```
 
-
 ## Usage
 
 Assuming you have the necessary binaries installed, it should "just work" with the default settings

README.md

@@ -21,8 +21,8 @@
         "issues": "https://github.com/axllent/silverstripe-image-optimiser/issues"
     },
     "require": {
-        "silverstripe/framework": "^4.0 || ^5.0",
-        "silverstripe/assets": "^1.10 || ^2.0",
+        "silverstripe/framework": "^4.0 || ^5.0 || ^6.0",
+        "silverstripe/assets": "^1.10 || ^2.0 || ^3.0",
         "spatie/image-optimizer": "^1.6.4"
     },
     "suggest": {