Updates rubocop-performance and config

spec/app/controllers/core_spec.rb

@@ -70,7 +70,7 @@ describe WPScan::Controller::Core do
         let(:cli_args) { "#{super()} --no-update" }
 
         it 'raises an error' do
-          expect { core.update_db_required? }. to raise_error(WPScan::Error::MissingDatabaseFile)
+          expect { core.update_db_required? }.to raise_error(WPScan::Error::MissingDatabaseFile)
         end
       end
 

spec/app/finders/plugin_version/readme_spec.rb

@@ -109,7 +109,7 @@ describe WPScan::Finders::PluginVersion::Readme do
         'a-lead-capture-contact-form-and-tab-button-by-awebvoicecom' => '3.1',
         'backup-scheduler' => '1.5.9',
         'release_date_slash' => '1.0.4'
-      }. each do |file, version_number|
+      }.each do |file, version_number|
         context "whith #{file}.txt" do
           it 'returns the expected version' do
             @file = "#{file}.txt"