Drop support for Ruby < 3.1, Rails < 6.1.

Also updates the gemspec a touch since I don't recall the last time I
saw it set a required rubygems version.

.github/workflows/ci.yml

@@ -12,19 +12,13 @@ jobs:
       fail-fast: false
       matrix:
         ruby:
-          - '2.7'
-          - '3.0'
           - '3.1'
           - '3.2'
           - '3.3'
         gemfile:
           - rails6.1
           - rails7.0
           - rails7.1
-        include:
-          - {ruby: '2.7', gemfile: rails5.1}
-          - {ruby: '2.7', gemfile: rails5.2}
-          - {ruby: '2.7', gemfile: rails6.0}
     steps:
       - uses: zendesk/checkout@v4
       - uses: zendesk/setup-ruby@v1

CHANGELOG.md

@@ -1,5 +1,8 @@
 ### Unreleased
 
+* Drop support for Ruby < 3.1.
+* Drop support for Rails < 6.1.
+
 ### Curly 3.3.0 (November 13, 2023)
 * Add support for Rails 7.1
 

Gemfile

@@ -1 +1 @@
-eval_gemfile 'gemfiles/rails5.2.gemfile'
+eval_gemfile 'gemfiles/rails6.1.gemfile'

curly-templates.gemspec

@@ -1,10 +1,6 @@
 require './lib/curly/version'
 
 Gem::Specification.new do |s|
-  s.specification_version = 2 if s.respond_to? :specification_version=
-  s.required_rubygems_version = Gem::Requirement.new(">= 0") if s.respond_to? :required_rubygems_version=
-  s.rubygems_version = '1.3.5'
-
   s.name              = 'curly-templates'
   s.version           = Curly::VERSION
 
@@ -20,7 +16,9 @@ Gem::Specification.new do |s|
 
   s.rdoc_options = ["--charset=UTF-8"]
 
-  s.add_dependency("actionpack", [">= 5.1", "< 7.2"])
+  s.required_ruby_version = ">= 3.1"
+
+  s.add_dependency("actionpack", [">= 6.1", "< 7.2"])
   s.add_dependency("sorted_set")
 
   s.add_development_dependency("railties", [">= 5.1", "< 7.2"])