Update SnakeYAML-Engine to 3.0.1

There are two CVEs in Guava, which is a test-scoped dependency of
this library. Guava is not shipped with the library so these CVEs
do not affect users, but the dependency may trigger security tools.
We update to avoid this false positive.

https://www.cve.org/CVERecord?id=CVE-2023-2976

https://www.cve.org/CVERecord?id=CVE-2020-8908

Fixes #780

Author: headius

lib/psych/versions.rb

@@ -5,6 +5,6 @@ module Psych
   VERSION = '5.3.1'
 
   if RUBY_ENGINE == 'jruby'
-    DEFAULT_SNAKEYAML_VERSION = '2.10'.freeze
+    DEFAULT_SNAKEYAML_VERSION = '3.0.1'.freeze
   end
 end