bump to 3.3.2

Author: oreoshake

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 3.3.2 minor fix to silence warnings when using rake
+
+[@dankohn](https://github.com/twitter/secureheaders/issues/257) was seeing "already initialized" errors in his output. This change conditionally defines the constants.
+
 ## 3.3.1 bugfix for boolean CSP directives
 
 [@stefansundin](https://github.com/twitter/secureheaders/pull/253) noticed that supplying `false` to "boolean" CSP directives (e.g. `upgrade-insecure-requests` and `block-all-mixed-content`) would still include the value.

secure_headers.gemspec

@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 Gem::Specification.new do |gem|
   gem.name          = "secure_headers"
-  gem.version       = "3.3.1"
+  gem.version       = "3.3.2"
   gem.authors       = ["Neil Matatall"]
   gem.email         = ["[email protected]"]
   gem.description   = 'Security related headers all in one gem.'