build(deps): bump cancancan from 2.2.0 to 2.3.0

Bumps [cancancan](https://github.com/CanCanCommunity/cancancan) from 2.2.0 to 2.3.0.
- [Release notes](https://github.com/CanCanCommunity/cancancan/releases)
- [Changelog](https://github.com/CanCanCommunity/cancancan/blob/develop/CHANGELOG.md)
- [Commits](CanCanCommunity/cancancan@2.2.0...2.3.0)

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

Gemfile

@@ -62,7 +62,7 @@ end
 gem 'devise'
 
 # Use CanCanCan for roles and permissions
-gem 'cancancan', '~> 2.0'
+gem 'cancancan', '~> 2.3'
 
 # Use Letter Opener for development mail previews
 gem 'letter_opener', group: :development

Gemfile.lock

@@ -49,7 +49,7 @@ GEM
     bindex (0.5.0)
     builder (3.2.3)
     byebug (10.0.2)
-    cancancan (2.2.0)
+    cancancan (2.3.0)
     capybara (3.7.2)
       addressable
       mini_mime (>= 0.1.3)
@@ -242,7 +242,7 @@ PLATFORMS
 
 DEPENDENCIES
   byebug
-  cancancan (~> 2.0)
+  cancancan (~> 2.3)
   capybara (~> 3.7)
   coffee-rails (~> 4.2)
   coveralls