Add travis.yml matrix[exclude] for Rails 6+ and Ruby <= 2.4

.travis.yml

@@ -18,6 +18,11 @@ gemfile:
 matrix:
   allow_failures:
     - rvm: ruby-head
+  exclude:
+    - rvm: 2.3
+      gemfile: gemfiles/Rails_6.0.x.gemfile
+    - rvm: 2.4
+      gemfile: gemfiles/Rails_6.0.x.gemfile
 
 notifications:
   email:

README.md

@@ -1,6 +1,6 @@
 # Protected Attributes Continued
 <a href="https://badge.fury.io/rb/protected_attributes_continued" target="_blank"><img height="21" style='border:0px;height:21px;' border='0' src="https://badge.fury.io/rb/protected_attributes_continued.svg" alt="Gem Version"></a>
-<a href='https://travis-ci.org/westonganger/protected_attributes_continued' target='_blank'><img height='21' style='border:0px;height:21px;' src='https://api.travis-ci.org/westonganger/protected_attributes_continued.svg?branch=master' border='0' alt='Build Status' /></a>
+<a href='https://travis-ci.com/westonganger/protected_attributes_continued' target='_blank'><img height='21' style='border:0px;height:21px;' src='https://api.travis-ci.org/westonganger/protected_attributes_continued.svg?branch=master' border='0' alt='Build Status' /></a>
 <a href='https://rubygems.org/gems/protected_attributes_continued' target='_blank'><img height='21' style='border:0px;height:21px;' src='https://ruby-gem-downloads-badge.herokuapp.com/protected_attributes_continued?label=rubygems&type=total&total_label=downloads&color=brightgreen' border='0' alt='RubyGems Downloads' /></a>
 
 > This is the community continued version of `protected_attributes` for Rails 5+. I recommend you only use it to support legacy portions of your application that you do not want to upgrade. The Rails team dropped this feature and switched to `strong_parameters` because of security issues. However some applications simply cannot be upgraded or security like this is a non-issue. To continue supporting this feature going forward lets continue the work here.