Update Ruby to v3.3

.github/workflows/main.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       matrix:
         ruby:
-          - '3.2.0'
+          - '3.3.0'
 
     steps:
     - uses: actions/checkout@v3

.rubocop.yml

@@ -5,7 +5,7 @@ require:
   - rubocop-rspec
 
 AllCops:
-  TargetRubyVersion: 3.2
+  TargetRubyVersion: 3.3
   DisplayCopNames: true
   NewCops: enable
 

.tool-versions

@@ -1,2 +1,2 @@
-ruby 3.2.2
+ruby 3.3.0
 bun 1.0.11

nostr.gemspec

@@ -12,7 +12,7 @@ Gem::Specification.new do |spec|
   spec.description = 'Client and relay implementation of the Nostr protocol.'
   spec.homepage = 'https://nostr-ruby.com/'
   spec.license = 'MIT'
-  spec.required_ruby_version = '>= 3.2.0'
+  spec.required_ruby_version = '>= 3.3.0'
   spec.metadata['rubygems_mfa_required'] = 'true'
 
   spec.metadata['homepage_uri'] = spec.homepage

spec/nostr_spec.rb

@@ -2,6 +2,6 @@
 
 RSpec.describe Nostr do
   it 'has a version number' do
-    expect(Nostr::VERSION).not_to be_nil
+    expect(described_class::VERSION).not_to be_nil
   end
 end