Added missing presence validation to WebVuln#request_method.

Author: postmodern

lib/ronin/db/web_vuln.rb

@@ -104,6 +104,7 @@ class WebVuln < ActiveRecord::Base
         trace:     'TRACE',
         unlock:    'UNLOCK'
       }, _suffix: :request
+      validates :request_method, presence: true
 
       # @!attribute [rw] lfi_os
       #   The LFI os.