Bump dependencies and supported Ruby version range

to keep up with the times.

This also swaps File.exists? which was
removed in Ruby 3.2? in favor of a grammatically
incorrect File.exist? :facepalm

(cherry picked from commit ea0555c)

Gemfile

@@ -1,13 +1,14 @@
 source 'https://rubygems.org'
 
-ruby '>= 2.6.0'
+# because we use an anscient version of ddtrace
+ruby '>= 2.7.0', '< 3.2'
 
 gemspec
 
 group :development do
   gem "rake"
-  gem "guard", "~> 2.18"
-  gem "guard-rspec", "~> 4.7", platform: :mri_23
+  gem "guard", "~> 2.14", platform: :mri
+  gem "guard-rspec", "~> 4.7", platform: :mri
 
   gem "yard", "~> 0.9"
   gem 'kramdown', "> 0", platform: :jruby

hutch.gemspec

@@ -3,10 +3,10 @@ require File.expand_path('../lib/hutch/version', __FILE__)
 Gem::Specification.new do |gem|
   if defined?(JRUBY_VERSION)
     gem.platform = 'java'
-    gem.add_runtime_dependency 'march_hare', '>= 3.0.0'
+    gem.add_runtime_dependency 'march_hare', '>= 4.5.0'
   else
     gem.platform = Gem::Platform::RUBY
-    gem.add_runtime_dependency 'bunny', '>= 2.20', '< 3.0'
+    gem.add_runtime_dependency 'bunny', '>= 2.23', '< 3.0'
   end
   gem.add_runtime_dependency 'carrot-top', '~> 0.0.7'
   gem.add_runtime_dependency 'multi_json', '~> 1.15'