Changelog.md in credit_card_validations-3.0.0 vs Changelog.md in credit_card_validations-3.1.0

@@ -1,4 +1,7 @@
+# 3.1.0
+   * Added support for ELO brand
+
 # 3.0.0
    * Remove Laser brand because Laser cards were withdrawn from the market on February 28 2014
    * Remove Diners US brand for similar reason
    * Move Laser ranges to Maestro. Add 6390 range to Maestro
    * Add plugins for removed brands