Bump version name to 3.0.19

Signed-off-by: Michael obi <[email protected]>

Author: michael-paystack

build.gradle

@@ -30,5 +30,5 @@ ext {
 
     buildToolsVersion = "29.0.2"
     supportLibraryVersion = "28.0.0"
-    versionName = "3.0.19-dev"
+    versionName = "3.0.19"
 }