Added isMouseEvent() fix for jQuery 3 to change log

For issue #158.

Author: stevenbenner

CHANGELOG.yml

@@ -7,6 +7,7 @@ v1.3.1:
       changes:
         - Apply popupClass before tooltip positioning.
         - Fixed non-functional tooltips on even number repeated powerTip() calls on the same element(s).
+        - Fixed issue with non-mouse events tracking invalid coordinates on jQuery 3.
 v1.3.0:
   date: 2017-01-15
   diff: https://github.com/stevenbenner/jquery-powertip/compare/v1.2.0...v1.3.0