Added rescue to catch error that only seems to happen in JRuby?
Added rescue to catch error that only seems to happen in JRuby?

rwygand/ruby-jwt,yahooguntu/ruby-jwt,larrylv/ruby-jwt,sferik/ruby-jwt,skippy/ruby-jwt,aj-michael/ruby-jwt,sporkmonger/ruby-jwt,iamjarvo/ruby-jwt,excpt/ruby-jwt,jwt/ruby-jwt,bkeepers/ruby-jwt,nycvotes-dev/ruby-jwt,JuanitoFatas/ruby-jwt,zenjoy/ruby-jwt,mgates/ruby-jwt,tobscher/ruby-jwt,threedaymonk/ruby-jwt,progrium/ruby-jwt,Oscil8/ruby-jwt,tjmw/ruby-jwt,ernie/ruby-jwt,petergoldstein/ruby-jwt,netmute/ruby-jwt,ab320012/ruby-jwt,danoph/ruby-jwt