👷 Fixes for truffleruby & jruby

Author: pboling

.rubocop_gradual.lock

@@ -79,7 +79,7 @@
     [3, 1, 31, "RSpec/SpecFilePathFormat: Spec path should end with `o_auth2/response*_spec.rb`.", 3190869319],
     [317, 33, 2, "RSpec/BeEq: Prefer `be` over `eq`.", 5860785]
   ],
-  "spec/oauth2/strategy/assertion_spec.rb:2269367634": [
+  "spec/oauth2/strategy/assertion_spec.rb:2442437952": [
     [6, 1, 42, "RSpec/SpecFilePathFormat: Spec path should end with `o_auth2/strategy/assertion*_spec.rb`.", 3665690869]
   ],
   "spec/oauth2/strategy/auth_code_spec.rb:142083698": [

spec/oauth2/strategy/assertion_spec.rb

@@ -129,7 +129,7 @@
             # this behavior is handled by the JWT gem, but this should make sure it is consistent
             # On old Ruby (versions 2.4 and below) the error raised was different because
             #   an old version (< v2.4) of the jwt gem gets installed.
-            if Gem::Version.new(JWT::VERSION) >= Gem::Version.new("2.4")
+            if Gem::Version.create(JWT::VERSION::STRING) >= Gem::Version.create("2.4")
               expect { client_assertion.get_token(claims, encoding_opts) }.to raise_error(JWT::EncodeError, "Unsupported signing method")
             else
               expect { client_assertion.get_token(claims, encoding_opts) }.to raise_error(NotImplementedError)