Centralize Ruby Version to .ruby-version

Set minimum version of Rubocop to 1.61
This is to support `.ruby-version`: rubocop/rubocop#12645
Also commit the Gemfile.lock: https://bundler.io/guides/faq.html#:~:text=A%3A%20Yes%2C%20you%20should%20commit,towards%20new%20and%20existing%20contributors.

.github/workflows/benchmark.yml

@@ -13,7 +13,6 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 3.1
         bundler-cache: true
 
     - name: Run benchmark on branch

.github/workflows/lint.yml

@@ -13,7 +13,6 @@ jobs:
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
-        ruby-version: 2.7
         bundler-cache: true
 
     - name: Run Rubocop

.gitignore

@@ -2,7 +2,6 @@
 doc
 *.gem
 .bundle
-Gemfile.lock
 pkg/*
 vendor/
 tmp/*

.rubocop.yml

@@ -5,7 +5,6 @@ require:
   - ./lib/statsd/instrument/rubocop.rb
 
 AllCops:
-  TargetRubyVersion: 2.7
   UseCache: true
   SuggestExtensions: false
   CacheRootDirectory: tmp/rubocop

.ruby-version

@@ -0,0 +1 @@
+3.3.0

Gemfile

@@ -8,6 +8,6 @@ gem "minitest"
 gem "rspec"
 gem "mocha"
 gem "yard"
-gem "rubocop", ">= 1.0"
+gem "rubocop", "~> 1.61"
 gem "rubocop-shopify", require: false
 gem "benchmark-ips"

Gemfile.lock

@@ -0,0 +1,75 @@
+PATH
+  remote: .
+  specs:
+    statsd-instrument (3.7.0)
+
+GEM
+  remote: https://rubygems.org/
+  specs:
+    ast (2.4.2)
+    benchmark-ips (2.13.0)
+    diff-lcs (1.5.1)
+    json (2.7.1)
+    language_server-protocol (3.17.0.3)
+    minitest (5.22.3)
+    mocha (2.1.0)
+      ruby2_keywords (>= 0.0.5)
+    parallel (1.24.0)
+    parser (3.3.0.5)
+      ast (~> 2.4.1)
+      racc
+    racc (1.7.3)
+    rainbow (3.1.1)
+    rake (13.1.0)
+    regexp_parser (2.9.0)
+    rexml (3.2.6)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.0)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-mocks (3.13.0)
+      diff-lcs (>= 1.2.0, < 2.0)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.1)
+    rubocop (1.62.1)
+      json (~> 2.3)
+      language_server-protocol (>= 3.17.0)
+      parallel (~> 1.10)
+      parser (>= 3.3.0.2)
+      rainbow (>= 2.2.2, < 4.0)
+      regexp_parser (>= 1.8, < 3.0)
+      rexml (>= 3.2.5, < 4.0)
+      rubocop-ast (>= 1.31.1, < 2.0)
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 2.4.0, < 3.0)
+    rubocop-ast (1.31.2)
+      parser (>= 3.3.0.4)
+    rubocop-shopify (2.15.1)
+      rubocop (~> 1.51)
+    ruby-progressbar (1.13.0)
+    ruby2_keywords (0.0.5)
+    unicode-display_width (2.5.0)
+    yard (0.9.36)
+
+PLATFORMS
+  arm64-darwin-23
+  ruby
+
+DEPENDENCIES
+  benchmark-ips
+  minitest
+  mocha
+  rake
+  rspec
+  rubocop (~> 1.61)
+  rubocop-shopify
+  statsd-instrument!
+  yard
+
+BUNDLED WITH
+   2.5.3

statsd-instrument.gemspec

@@ -20,5 +20,7 @@ Gem::Specification.new do |spec|
   spec.test_files = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
+  spec.required_ruby_version = ">= 2.6.0"
+
   spec.metadata['allowed_push_host'] = "https://rubygems.org"
 end