Merge branch 'halloween-theme' of https://github.com/allonsyalexa/slackthemes into allonsyalexa-halloween-theme

* 'halloween-theme' of https://github.com/allonsyalexa/slackthemes:
  Added Halloween theme to themes.yml

data/themes.yml

@@ -151,3 +151,4 @@
 - { colors: '#6044db,#500ba3,#f0b31a,#FFFFFF,#997929,#ffffff,#f0b31a,#a92ab0', name: 'Mautic' }
 - { colors: '#6fa36f,#3E313C,#01690b,#ffff00,#3E313C,#ffffff,#faff78,#ed687e', name: 'Drupal Twig'}
 - { colors: '#014A83,#053354,#dd661e,#ffffff,#053354,#ffffff,#dd661e,#dd661e', name: 'Florida Gators'}
+- { colors: '#ff8800,#000000,#ffffff,#000000,#4a5664,#000000,#000000,#736e65', name: 'Halloween'}