docs: Fix proguard rules. (#478)

pdavid0 · DylanVann · commit 1eed5750258a · 2019-05-25T17:15:29.000-04:00
diff --git a/README.md b/README.md
@@ -99,6 +99,7 @@ If you use Proguard you will need to add these lines to `android/app/proguard-ru
 -keep public enum com.bumptech.glide.load.ImageHeaderParser$** {
   **[] $VALUES;
   public *;
+}
 ```
 
 ## Properties
