Update flexible adapter

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/build.gradle

@@ -117,7 +117,7 @@ dependencies {
 
     implementation 'com.github.HITGIF:TextFieldBoxes:1.3.4'
 
-    implementation 'eu.davidea:flexible-adapter:5.0.0-rc2'
+    implementation 'eu.davidea:flexible-adapter:5.0.0-rc3'
 
     implementation 'cn.carbs.android:AvatarImageView:1.0.4'