Update commander requirement from >= 4.4.3, < 4.6.0 to >= 4.4.3, < 4.7.0

Updates the requirements on [commander](https://github.com/commander-rb/commander) to permit the latest version.
- [Release notes](https://github.com/commander-rb/commander/releases)
- [Changelog](https://github.com/commander-rb/commander/blob/master/History.rdoc)
- [Commits](commander-rb/commander@v4.4.3...v4.6.0)

Signed-off-by: dependabot[bot] <support@github.com>

vmfloaty.gemspec

@@ -25,6 +25,6 @@ Gem::Specification.new do |s|
   s.require_path = 'lib'
 
   s.add_dependency 'colorize', '~> 0.8.1'
-  s.add_dependency 'commander', '>= 4.4.3', '< 4.6.0'
+  s.add_dependency 'commander', '>= 4.4.3', '< 4.7.0'
   s.add_dependency 'faraday', '~> 0.17.0'
 end