upgrade ddtrace to datadog v2

Gemfile.lock

@@ -2,29 +2,26 @@ PATH
   remote: .
   specs:
     degica_datadog (0.1.0)
-      ddtrace (~> 1.0)
+      datadog (~> 2.0)
       dogstatsd-ruby (~> 5)
 
 GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    datadog-ci (0.5.1)
-      msgpack
-    ddtrace (1.18.0)
-      datadog-ci (~> 0.5.0)
-      debase-ruby_core_source (= 3.2.3)
-      libdatadog (~> 5.0.0.1.0)
+    datadog (2.2.0)
+      debase-ruby_core_source (= 3.3.1)
+      libdatadog (~> 10.0.0.1.0)
       libddwaf (~> 1.14.0.0.0)
       msgpack
-    debase-ruby_core_source (3.2.3)
+    debase-ruby_core_source (3.3.1)
     diff-lcs (1.5.0)
     docile (1.4.1)
     dogstatsd-ruby (5.6.1)
-    ffi (1.16.3)
+    ffi (1.17.0)
     json (2.7.1)
     language_server-protocol (3.17.0.3)
-    libdatadog (5.0.0.1.0)
+    libdatadog (10.0.0.1.0)
     libddwaf (1.14.0.0.0)
       ffi (~> 1.0)
     msgpack (1.7.2)
@@ -86,4 +83,4 @@ DEPENDENCIES
   simplecov-cobertura
 
 BUNDLED WITH
-   2.2.33
+   2.5.17

degica_datadog.gemspec

@@ -24,7 +24,7 @@ Gem::Specification.new do |spec|
   end
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "ddtrace", "~> 1.0"
+  spec.add_dependency "datadog", "~> 2.0"
   spec.add_dependency "dogstatsd-ruby", "~> 5"
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "rspec", "~> 3.0"

lib/degica_datadog/tracing.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require "ddtrace"
+require "datadog"
 
 module DegicaDatadog
   # Tracing related functionality.
@@ -10,7 +10,7 @@ class << self # rubocop:disable Metrics/ClassLength
       def init(rake_tasks: []) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength,Metrics/CyclomaticComplexity,Metrics/PerceivedComplexity
         return unless Config.enabled?
 
-        require "ddtrace/auto_instrument"
+        require "datadog/auto_instrument"
 
         Datadog.configure do |c| # rubocop:disable Metrics/BlockLength
           c.service = Config.service