Update minimum requirements after PR was merged

Author: edwilde

README.md

@@ -10,9 +10,7 @@ This module allows Silverstripe CMS ORM data to be encrypted before being stored
 
 
 ## Requirements
-* SilverStripe CMS 4
-* Requires a version of silverstripe-framework that includes [this pull request](https://github.com/silverstripe/silverstripe-framework/pull/10047), or for this PR to be manually patched into your version of framework.
-
+* SilverStripe CMS 4.9
 
 ## Installation
 Install via Composer:

composer.json

@@ -16,7 +16,7 @@
         "source": "https://github.com/madmatt/silverstripe-encrypt-at-rest"
     },
     "require": {
-        "silverstripe/framework": "^4.1",
+        "silverstripe/framework": "^4.9.0",
         "defuse/php-encryption": "^2.2"
     },
     "require-dev": {