Get Rubocop green

Author: alexrudall

.rubocop.yml

@@ -0,0 +1,23 @@
+AllCops:
+  TargetRubyVersion: 2.7
+
+  NewCops: enable
+
+Style/Documentation:
+  # Skips checking to make sure top level modules / classes have a comment.
+  Enabled: false
+
+Layout/LineLength:
+  Max: 100
+
+Metrics/BlockLength:
+  Exclude:
+    - "Rakefile"
+    - "**/*.rake"
+    - "spec/**/*.rb"
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/FrozenStringLiteralComment:
+  Enabled: false

Rakefile

@@ -3,4 +3,4 @@ require "rspec/core/rake_task"
 
 RSpec::Core::RakeTask.new(:spec)
 
-task :default => :spec
+task default: :spec

lib/ruby/openai/version.rb

@@ -1,5 +1,5 @@
 module Ruby
   module Openai
-    VERSION = "0.1.0"
+    VERSION = "0.1.0".freeze
   end
 end

ruby-openai.gemspec

@@ -1,4 +1,4 @@
-require_relative 'lib/ruby/openai/version'
+require_relative "lib/ruby/openai/version"
 
 Gem::Specification.new do |spec|
   spec.name          = "ruby-openai"
@@ -19,7 +19,7 @@ Gem::Specification.new do |spec|
 
   # Specify which files should be added to the gem when it is released.
   # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
-  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+  spec.files = Dir.chdir(File.expand_path(__dir__)) do
     `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
   end
   spec.bindir        = "exe"