updated new version info to the change log

Author: kevincobain2000

README.md

@@ -138,4 +138,5 @@ Fixing lints
 - v1.15 Adds Filter and fall back to regexp upon Exception
 - v1.17 Donot restrict to FormRequest
 - v1.18 Fix where prism had fixed height. Allow text area resize.
+- v1.18 Updated UI and pushed unit tests