Update gemspec to support Rails 8

Gemfile.lock

@@ -7,24 +7,23 @@ PATH
 GEM
   remote: https://rubygems.org/
   specs:
-    actionpack (7.2.2.1)
-      actionview (= 7.2.2.1)
-      activesupport (= 7.2.2.1)
+    actionpack (8.0.1)
+      actionview (= 8.0.1)
+      activesupport (= 8.0.1)
       nokogiri (>= 1.8.5)
-      racc
-      rack (>= 2.2.4, < 3.2)
+      rack (>= 2.2.4)
       rack-session (>= 1.0.1)
       rack-test (>= 0.6.3)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
       useragent (~> 0.16)
-    actionview (7.2.2.1)
-      activesupport (= 7.2.2.1)
+    actionview (8.0.1)
+      activesupport (= 8.0.1)
       builder (~> 3.1)
       erubi (~> 1.11)
       rails-dom-testing (~> 2.2)
       rails-html-sanitizer (~> 1.6)
-    activesupport (7.2.2.1)
+    activesupport (8.0.1)
       base64
       benchmark (>= 0.3)
       bigdecimal
@@ -36,6 +35,7 @@ GEM
       minitest (>= 5.1)
       securerandom (>= 0.3)
       tzinfo (~> 2.0, >= 2.0.5)
+      uri (>= 0.13.1)
     base64 (0.2.0)
     benchmark (0.4.0)
     bigdecimal (3.1.9)
@@ -108,6 +108,7 @@ GEM
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
     unaccent (0.4.0)
+    uri (1.0.2)
     useragent (0.16.11)
 
 PLATFORMS
@@ -117,7 +118,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
-  actionpack (~> 7.0)
+  actionpack (> 7.0)
   country_select!
   pry (~> 0)
   rake (~> 13)

country_select.gemspec

@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = '>= 3.1'
 
-  s.add_development_dependency 'actionpack', '~> 7.0'
+  s.add_development_dependency 'actionpack', '> 7.0'
   s.add_development_dependency 'pry', '~> 0'
   s.add_development_dependency 'rake', '~> 13'
   s.add_development_dependency 'rspec', '~> 3'