Fix RuboCop violations

bin/console

@@ -1,8 +1,8 @@
 #!/usr/bin/env ruby
 # frozen_string_literal: true
 
-require "bundler/setup"
-require "nostr"
+require 'bundler/setup'
+require 'nostr'
 
 # You can add fixtures and/or initialization code here to make experimenting
 # with your gem easier. You can also use a different console, if you like.
@@ -11,5 +11,5 @@ require "nostr"
 # require "pry"
 # Pry.start
 
-require "irb"
+require 'irb'
 IRB.start(__FILE__)