Bump version to 3.2.1-dev

Author: willdurand

src/Geocoder/Geocoder.php

@@ -20,7 +20,7 @@ interface Geocoder
  /**
  * Version
  */
- const VERSION = '3.2.0';
+ const VERSION = '3.2.1-dev';
 
  /**
  * Geocodes a given value.