👷 try to fix dependabot

Author: pboling

oauth2.gemspec

@@ -2,14 +2,12 @@
 # frozen_string_literal: true
 
 gem_version =
-  if RUBY_VERSION >= "3.1"
+  if Gem::Version.new(RUBY_VERSION) >= "3.1"
     # Loading version into an anonymous module allows version.rb to get code coverage from SimpleCov!
     # See: https://github.com/simplecov-ruby/simplecov/issues/557#issuecomment-2630782358
     Module.new.tap { |mod| Kernel.load("lib/oauth2/version.rb", mod) }::OAuth2::Version::VERSION
   else
-    lib = File.expand_path("lib", __dir__)
-    $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
-    require "oauth2/version"
+    require_relative "lib/oauth2/version"
     OAuth2::Version::VERSION
   end