fix uuid_v4 error for older rubies

Author: noraj

docs/CHANGELOG.md

@@ -5,6 +5,7 @@
 ## [0.0.3]
 
 - Temporarirlly add `base64` as a direct dependency while waiting for a new release of `dnsruby` in order to fix a warning. See Gemfile for details.
+- Fix `undefined method 'uuid_v4' for Random:Class (NoMethodError)` for Ruby 3.0-3.2 when calling `ADAssault::DNS:DUZDU#checkv4` like in CLI sub-command `ada dns duzdu check`.
 
 ## [0.0.2]
 

lib/adassault/dns/duzdu.rb

@@ -102,7 +102,12 @@ def deletev4(name)
       def checkv4
         networks = ['10.0.0.0/8', '172.16.0.0/12', '192.168.0.0/16'].map { |x| IPAddr.new(x) }
         network = networks.sample
-        name = Random.uuid_v4
+        begin
+          name = Random.uuid_v4 # Ruby 3.3+
+        rescue NoMethodError
+          # see https://github.com/ruby/securerandom/issues/31
+          name = Random.uuid # Ruby 3.2-
+        end
         ip = IPAddr.new(rand(network.to_range.begin.succ.to_i..network.to_range.end.to_i - 1), network.family)
         created = addv4(name, ip)
         # if created