fix rubocop issues

.rubocop.yml

@@ -5,7 +5,7 @@ inherit_gem:
 
 AllCops:
   DisplayCopNames: true
-  TargetRubyVersion: 2.7
+  TargetRubyVersion: 3.0
   Include:
     - bin/console
     - Gemfile
@@ -19,3 +19,6 @@ AllCops:
 
 RSpec/Rails/HaveHttpStatus:
   Enabled: false
+
+RSpec/SpecFilePathFormat:
+  Enabled: false

Gemfile

@@ -2,3 +2,14 @@
 
 source "https://rubygems.org"
 gemspec
+
+gem "bundler"
+gem "coveralls"
+gem "pry"
+gem "rake"
+gem "rspec"
+gem "rubocop-config-umbrellio"
+gem "rubocop-rake"
+gem "simplecov"
+gem "simplecov-lcov"
+gem "webmock"

bin/rspec

@@ -15,7 +15,7 @@ ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
 bundle_binstub = File.expand_path("bundle", __dir__)
 
 if File.file?(bundle_binstub)
-  if /This file was generated by Bundler/.match?(File.read(bundle_binstub, 300))
+  if File.read(bundle_binstub, 300).include?("This file was generated by Bundler")
     load(bundle_binstub)
   else
     abort("Your `bin/bundle` was not generated by Bundler, so this binstub cannot run.

ezclient.gemspec

@@ -20,15 +20,4 @@ Gem::Specification.new do |spec|
   spec.require_paths = ["lib"]
 
   spec.add_runtime_dependency "http", ">= 4"
-
-  spec.add_development_dependency "bundler"
-  spec.add_development_dependency "coveralls"
-  spec.add_development_dependency "pry"
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "rspec"
-  spec.add_development_dependency "rubocop-config-umbrellio"
-  spec.add_development_dependency "rubocop-rake"
-  spec.add_development_dependency "simplecov"
-  spec.add_development_dependency "simplecov-lcov"
-  spec.add_development_dependency "webmock"
 end

spec/ezclient_spec.rb

@@ -132,7 +132,7 @@ def self.sign!(*); end
 
         expect(webmock_requests.last.body).to eq('{"a":1}')
         expect(webmock_requests.last.headers).to include(
-          "Content-Type" => "application/json; charset=UTF-8",
+          "Content-Type" => "application/json; charset=utf-8",
         )
       end
     end