Merge branch 'master' into pulls/TMP-ss4-upgrade

* master:
  Update README.md
  Update README.md
  Cast the value to decrypt to a string to prevent type-errors

# Conflicts:
#	README.md

Author: edwilde

README.md

@@ -40,7 +40,7 @@ In your `DataObject`, create new database fields using an encrypted field type.
 
 For example:
 
-```
+```php
 use Madmatt\EncryptAtRest\FieldType\EncryptedVarchar;
 
 class SecureDataObject extends DataObject {

src/FieldType/EncryptedText.php

@@ -35,6 +35,8 @@ public function setValue($value, $record = null, $markChanged = true)
 
     public function getDecryptedValue($value)
     {
+        // Type hardening for PHP 8.1+
+        $value = (string)$value;
         // Test if we're actually an encrypted value;
         if (ctype_xdigit($value) && strlen($value) > 130) {
             try {