Fix SilverStripe framework version requirement

README.md

@@ -1,5 +1,5 @@
-Tiled GridField for SilverStripe 3
-==================================
+Tiled GridField for SilverStripe
+================================
 
 Inline/tiled images in a standard SilverStripe GridField table.
 
@@ -15,6 +15,11 @@ and it should be an image (thumbnail). The images should at least all be the sam
 
 Please note that if more than one `$summary_fields` is used then the layout will break.
 
+## Installation
+```
+composer require axllent/silverstripe-tiled-gridfield
+```
+
 ## Example
 ```php
 $gridFieldConfig = GridFieldConfig_RecordEditor::create(200);
@@ -33,4 +38,4 @@ $gridFieldConfig->addComponent(new GridFieldBulkUpload());
 $gridFieldConfig->getComponentByType('GridFieldBulkUpload')->setConfig('folderName', 'Photos');
 $gridField = new TiledGridField('AlbumImages', 'Album Images', $this->Photos(), $gridFieldConfig);
 $fields->addFieldToTab('Root.Main', $gridField);
-```
+```

composer.json

@@ -20,6 +20,6 @@
 		"issues": "https://github.com/axllent/silverstripe-tiled-gridfield/issues"
 	},
 	"require": {
-		"silverstripe/cms": ">=3.1"
+		"silverstripe/cms": "^3.1"
 	}
-}
+}