Updated proguard to ignore fernflower

Author: niranjan94

app/proguard-rules.pro

@@ -53,6 +53,9 @@
 
 -keep class com.crashlytics.** { *; }
 -keep class com.crashlytics.android.**
+-keep class org.jetbrains.java.decompiler.** { *; }
+-keep class org.jetbrains.java.decompiler.**
+
 -keepattributes SourceFile,LineNumberTable
 
 -keep public class * extends java.lang.Exception
@@ -75,4 +78,5 @@
 -dontwarn uk.**
 -dontwarn io.**
 -dontwarn jadx.**
--dontwarn java.**
+-dontwarn java.**
+-dontwarn org.jetbrains.java.decompiler.**