3.3.0 version bump and docs

Author: oreoshake

CHANGELOG.md

@@ -1,3 +1,11 @@
+## 3.3.0 referrer-policy support
+
+While not officially part of the spec and not implemented anywhere, support for the experimental [`referrer-policy` header](https://w3c.github.io/webappsec-referrer-policy/#referrer-policy-header) was [preemptively added](https://github.com/twitter/secureheaders/pull/249).
+
+Additionally, two minor enhancements were added this version:
+1. [Warn when the HPKP report host is the same as the current host](https://github.com/twitter/secureheaders/pull/246). By definition any generated reports would be reporting to a known compromised connection.
+1. [Filter unsupported CSP directives when using Edge](https://github.com/twitter/secureheaders/pull/247). Previously, this was causing many warnings in the developer console.
+
 ## 3.2.0 Cookie settings and CSP hash sources
 
 ### Cookies

secure_headers.gemspec

@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 Gem::Specification.new do |gem|
   gem.name          = "secure_headers"
-  gem.version       = "3.2.0"
+  gem.version       = "3.3.0"
   gem.authors       = ["Neil Matatall"]
   gem.email         = ["[email protected]"]
   gem.description   = 'Security related headers all in one gem.'