Test ruby-head with edgerails since they keep up with each other

Author: UweKubosch

.travis.yml

@@ -15,7 +15,7 @@ matrix:
   include:
     # Bleeding edge Ruby
     - rvm: ruby-head
-      gemfile: gemfiles/6.0.gemfile
+      gemfile: gemfiles/edge.gemfile
 
     # Next version of Rails
     - rvm: 2.7.1

Gemfile

@@ -5,6 +5,7 @@ gemspec
 # Uncomment and change rails version for testing purposes
 # gem "rails", "~> 5.2.0"
 gem "rails", "~> 6.0.0"
+# gem "rails", git: "https://github.com/rails/rails.git"
 
 group :development do
   gem "chandler", ">= 0.7.0"