Update release notes

Author: nknapp

release-notes.md

@@ -2,7 +2,22 @@
 
 ## Development
 
-[Commits](https://github.com/wycats/handlebars.js/compare/v4.6.0...master)
+[Commits](https://github.com/wycats/handlebars.js/compare/v4.7.0...master)
+
+## v4.7.0 - January 10th, 2020
+
+Features:
+
+- feat: default options for controlling proto access - 7af1c12, #1635
+  - This makes it possible to disable the prototype access restrictions added in 4.6.0
+  - an error is logged in the console, if access to prototype properties is attempted and denied
+    and no explicit configuration has taken place.
+
+Compatibility notes:
+
+- no compatibilities are expected
+
+[Commits](https://github.com/wycats/handlebars.js/compare/v4.6.0...v4.7.0)
 
 ## v4.6.0 - January 8th, 2020