Upgrade dependencies, Ruby 3.2 compat

Gemfile

@@ -1,12 +1,12 @@
 source 'https://rubygems.org'
 
-ruby '>= 2.3.0'
+ruby '>= 2.6.0'
 
 gemspec
 
 group :development do
   gem "rake"
-  gem "guard", "~> 2.14", platform: :mri_23
+  gem "guard", "~> 2.18"
   gem "guard-rspec", "~> 4.7", platform: :mri_23
 
   gem "yard", "~> 0.9"
@@ -16,21 +16,20 @@ group :development do
 end
 
 group :development, :test do
-  gem "rspec", "~> 3.5"
-  gem "simplecov", "~> 0.12"
+  gem "rspec", "~> 3.12"
+  gem "simplecov", "~> 0.21"
 
   gem "sentry-raven"
   gem "sentry-ruby"
   gem "honeybadger"
-  gem "coveralls", "~> 0.8.15", require: false
   gem "newrelic_rpm"
-  gem "ddtrace", "~> 0.54.2"
-  gem "airbrake", "~> 10.0"
+  gem "ddtrace", "~> 1.8"
+  gem "airbrake", "~> 13.0"
   gem "rollbar"
   gem "bugsnag"
 end
 
 group :development, :darwin do
-  gem "rb-fsevent", "~> 0.9"
+  gem "rb-fsevent", "~> 0.11.2"
   gem "growl", "~> 1.0.3"
 end

hutch.gemspec

@@ -6,7 +6,7 @@ Gem::Specification.new do |gem|
     gem.add_runtime_dependency 'march_hare', '>= 3.0.0'
   else
     gem.platform = Gem::Platform::RUBY
-    gem.add_runtime_dependency 'bunny', '>= 2.19', '< 3.0'
+    gem.add_runtime_dependency 'bunny', '>= 2.20', '< 3.0'
   end
   gem.add_runtime_dependency 'carrot-top', '~> 0.0.7'
   gem.add_runtime_dependency 'multi_json', '~> 1.15'
@@ -16,7 +16,7 @@ Gem::Specification.new do |gem|
   gem.summary = 'Opinionated asynchronous inter-service communication using RabbitMQ'
   gem.description = 'Hutch is a Ruby library for enabling asynchronous inter-service communication using RabbitMQ'
   gem.version = Hutch::VERSION.dup
-  gem.required_ruby_version = '>= 2.2'
+  gem.required_ruby_version = '>= 2.6'
   gem.authors = ['Harry Marr', 'Michael Klishin']
   gem.homepage = 'https://github.com/ruby-amqp/hutch'
   gem.require_paths = ['lib']

lib/hutch/cli.rb

@@ -234,7 +234,7 @@ def daemonise_process
     end
 
     def abort_without_file(file, file_description, &block)
-      abort_with_message("#{file_description} '#{file}' not found") unless File.exists?(file)
+      abort_with_message("#{file_description} '#{file}' not found") unless File.exist?(file)
 
       yield
     end

lib/hutch/tracers/datadog.rb

@@ -1,4 +1,5 @@
 require 'ddtrace'
+require 'ddtrace/auto_instrument'
 
 module Hutch
   module Tracers
@@ -8,7 +9,7 @@ def initialize(klass)
       end
 
       def handle(message)
-        ::Datadog.tracer.trace(@klass.class.name, service: 'hutch', span_type: 'rabbitmq') do
+        ::Datadog::Tracing.trace(@klass.class.name, continue_from: nil, service: 'hutch', type: 'rabbitmq') do
           @klass.process(message)
         end
       end

spec/hutch/error_handlers/sentry_raven_spec.rb

@@ -15,7 +15,7 @@
     end
 
     it "logs the error to Sentry" do
-      expect(Raven).to receive(:capture_exception).with(error, extra: { payload: payload })
+      expect(Raven).to receive(:capture_exception).with(error, {extra: { payload: payload }})
       error_handler.handle(properties, payload, double, error)
     end
   end

spec/hutch/tracers/datadog_spec.rb

@@ -25,14 +25,14 @@ def process(message)
     let(:message) { double(:message) }
 
     before do
-      allow(Datadog.tracer).to receive(:trace).and_call_original
+      allow(::Datadog::Tracing).to receive(:trace).and_call_original
     end
 
     it 'uses Datadog tracer' do
       handle
 
-      expect(Datadog.tracer).to have_received(:trace).with('ClassName',
-        hash_including(service: 'hutch', span_type: 'rabbitmq'))
+      expect(::Datadog::Tracing).to have_received(:trace).with('ClassName',
+        hash_including(service: 'hutch', type: 'rabbitmq'))
     end
 
     it 'processes the message' do