Release v4.0.0

Breaking Changes:
- Use --json for ip command output #251

Added:
- Add network interface loopback #254
- Add LinuxAdmin::NetworkInterface.list #249

Changed:
- Parse config file on NetworkInterface#reload #253

Test:
- Use ruby 3.1 and rails 7 for code coverage #250
- Fix rubocop warnings in NetworkInterface Spec #252
- Update paambaati/codeclimate-action action to v8 #248

lib/linux_admin/version.rb

@@ -1,3 +1,3 @@
 module LinuxAdmin
-  VERSION = "3.0.0".freeze
+  VERSION = "4.0.0".freeze
 end