Drop Ruby 2.7 support

Author: marcoroth

.github/workflows/tests.yml

@@ -14,7 +14,6 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - 2.7
           - '3.0'
           - 3.1
           - 3.2

turbo_power.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description = spec.summary
   spec.homepage = "https://github.com/marcoroth/turbo_power-rails"
   spec.license = "MIT"
-  spec.required_ruby_version = ">= 2.7.0"
+  spec.required_ruby_version = ">= 3.0.0"
 
   spec.metadata["homepage_uri"] = spec.homepage
   spec.metadata["source_code_uri"] = "https://github.com/marcoroth/turbo_power-rails"