Bump secure_headers

Gemfile

@@ -155,7 +155,7 @@ gem "string-direction", "1.2.2"
 
 # Security Headers
 
-gem "secure_headers", "6.3.2"
+gem "secure_headers", "6.3.3"
 
 # Services
 

Gemfile.lock

@@ -680,7 +680,7 @@ GEM
     scss_lint (0.55.0)
       rake (>= 0.9, < 13)
       sass (~> 3.4.20)
-    secure_headers (6.3.2)
+    secure_headers (6.3.3)
     shoulda-matchers (4.5.1)
       activesupport (>= 4.2.0)
     sidekiq (6.2.1)
@@ -909,7 +909,7 @@ DEPENDENCIES
   ruby-oembed (= 0.15.0)
   rubyzip (= 2.3.2)
   sass-rails (= 5.0.7)
-  secure_headers (= 6.3.2)
+  secure_headers (= 6.3.3)
   shoulda-matchers (= 4.5.1)
   sidekiq (= 6.2.1)
   sidekiq-cron (= 1.2.0)