Update readme.md

Author: jessuppi

readme.md

@@ -4,6 +4,11 @@ Anonymous bbPress guest posting
 
 ## Changelog
 
+### 1.0.3
+- added sanitize to inputs
+- minor code cleanup
+- bumped minimum PHP to 7.0
+
 ### 1.0.2
 - added disable wordpress.org snippet
 - improved plugin headers for Git Updater compatibility