Drop support for Ruby 2.4 and below

Author: jasonbosco

.github/workflows/tests.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        ruby-version: ['2.6', '2.7', '3.0']
+        ruby-version: ['2.7', '3.0', '3.2']
 
     steps:
       - uses: actions/checkout@v3

typesense.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |spec|
   spec.license       = 'Apache-2.0'
 
   # rubocop:disable Gemspec/RequiredRubyVersion
-  spec.required_ruby_version = '>= 2.4'
+  spec.required_ruby_version = '>= 2.7'
   # rubocop:enable Gemspec/RequiredRubyVersion
 
   spec.files = `git ls-files -z`.split("\x0").reject do |f|