Require Ruby >= 3.3 and update CI Ruby versions (#30)

* Require Ruby >= 3.3 and update CI Ruby versions

* Bump bundler to 4.0.15

Author: dduugg

.github/workflows/ci.yml

@@ -13,7 +13,6 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - 3.2
           - 3.3
           - 3.4
           - 4.0

.rubocop.yml

@@ -13,7 +13,7 @@ AllCops:
   NewCops: enable
   Exclude:
     - vendor/bundle/**/**
-  TargetRubyVersion: 2.6
+  TargetRubyVersion: 3.3
 
 Metrics/ParameterLists:
   Enabled: false

Gemfile.lock

@@ -137,4 +137,4 @@ DEPENDENCIES
   tapioca
 
 BUNDLED WITH
-   2.2.34
+   4.0.15

packs-specification.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   # Specify which files should be added to the gem when it is released.
   spec.files = Dir['README.md', 'lib/**/*']
   spec.require_paths = ['lib']
-  spec.required_ruby_version = '>= 3.1'
+  spec.required_ruby_version = '>= 3.3'
 
   spec.add_dependency 'sorbet-runtime'