update version to 6.7.1

Author: tibbi

app/build.gradle

@@ -17,8 +17,8 @@ android {
         applicationId "com.simplemobiletools.contacts.pro"
         minSdkVersion 21
         targetSdkVersion 29
-        versionCode 57
-        versionName "6.7.0"
+        versionCode 58
+        versionName "6.7.1"
         setProperty("archivesBaseName", "contacts")
     }