Update devise requirement from ~> 4.4.0 to >= 4.4, < 4.7

Updates the requirements on [devise](https://github.com/plataformatec/devise) to permit the latest version.
- [Release notes](https://github.com/plataformatec/devise/releases)
- [Changelog](https://github.com/plataformatec/devise/blob/master/CHANGELOG.md)
- [Commits](heartcombo/devise@v4.4.0...v4.6.1)

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

Author: dependabot-support

spree_auth_devise.gemspec

@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   s.require_path = 'lib'
   s.requirements << 'none'
 
-  s.add_dependency 'devise', '~> 4.4.0'
+  s.add_dependency 'devise', '>= 4.4', '< 4.7'
   s.add_dependency 'devise-encryptable', '0.2.0'
 
   spree_version = '>= 3.1.0', '< 4.0'