update changelog

Author: tiagoschenkel

CHANGELOG.md

@@ -45,6 +45,14 @@ Types of changes:
 
 ## Signals 1.0.0
 
+### [v1.0.2](https://github.com/RobotlegsJS/SignalsJS/releases/tag/1.0.2) - 2019-07-18
+
+#### Changed
+
+- Fix security vulnerabilities related to outdated dependencies (see #111).
+
+- Update dev dependencies to latest version.
+
 ### [v1.0.1](https://github.com/RobotlegsJS/SignalsJS/releases/tag/1.0.1) - 2019-03-20
 
 #### Changed