Removed async from detectDishType

src/core/Dish.mjs

@@ -146,7 +146,7 @@ class Dish {
      * Detects the MIME type of the current dish
      * @returns {string}
      */
-    async detectDishType() {
+    detectDishType() {
         const data = new Uint8Array(this.value.slice(0, 2048)),
             types = detectFileType(data);
 
@@ -177,7 +177,7 @@ class Dish {
                 break;
             case Dish.ARRAY_BUFFER:
             case Dish.BYTE_ARRAY:
-                title = await this.detectDishType();
+                title = this.detectDishType();
                 if (title !== null) break;
                 // fall through if no mime type was detected
             default: