Merge branch 'psych-issue'

lib/wpscan/db/dynamic_finders/base.rb

@@ -11,7 +11,11 @@ module WPScan
 
         # @return [ Hash ]
         def self.all_df_data
-          @all_df_data ||= YAML.safe_load(File.read(df_file), [Regexp])
+          @all_df_data ||= if Gem::Version.new(Psych::VERSION) >= Gem::Version.new('4.0.0')
+                             YAML.safe_load(File.read(df_file), permitted_classes: [Regexp])
+                           else
+                             YAML.safe_load(File.read(df_file), [Regexp])
+                           end
         end
 
         # @return [ Array<Symbol> ]