Remove custom dependency for asset-admin

Also fix `Image::Quality` to match signature on parent

composer.json

@@ -13,14 +13,10 @@
       "homepage": "https://www.example.com"
     }
   ],
-  "repositories": [{
-    "type": "vcs",
-    "url": "git@github.com:oilee80/silverstripe-asset-admin.git"
-  }],
   "require": {
     "cloudinary/cloudinary_php": "dev-master",
     "php": ">=7.0.0",
-    "silverstripe/asset-admin": "1.1.0-rc3"
+    "silverstripe/asset-admin": "^1.1"
   },
   "autoload": {
     "psr-4": {

src/Model/Image.php

@@ -144,7 +144,12 @@ public function Crop(string $crop = 'fill')
      * @param int $quality
      * @return CachedImage
      */
-    public function Quality(string $quality = 'auto')
+    public function Quality($quality)
+    {
+        return $quality ? $this->setQuality($quality) : $this->setQuality();
+    }
+
+    public function setQuality(string $quality= 'auto')
     {
         return $this->Transform([ 'quality' => $quality ]);
     }