Bump JRuby to 9.2.1.0 for CharSequence newString

This RubyString factory was added in 9.2.1.0. Since nobody should
expect support for 9.2.0.0 at this point, I am bumping the compile-
time dependency.

Author: headius

Mavenfile

@@ -82,7 +82,7 @@ plugin :clean do
                  'failOnError' =>  'false' )
 end
 
-jar 'org.jruby:jruby-core', '9.2.0.0', :scope => :provided
+jar 'org.jruby:jruby-core', '9.2.1.0', :scope => :provided
 # for invoker generated classes we need to add javax.annotation when on Java > 8
 jar 'javax.annotation:javax.annotation-api', '1.3.1', :scope => :compile
 jar 'org.junit.jupiter:junit-jupiter', '5.11.4', :scope => :test