Support Rails 5.1

.travis.yml

@@ -1,13 +1,11 @@
 language: ruby
 rvm:
-  - 2.0.0
-  - 2.1.0
-  - 2.2.0
+  - 2.2.5
+  - 2.3.4
+  - 2.4.1
 env:
   - STRATEGY=array
   - STRATEGY=ltree
 gemfile:
-  - gemfiles/activerecord_4.0.gemfile
-  - gemfiles/activerecord_4.1.gemfile
-  - gemfiles/activerecord_4.2.gemfile
+  - gemfiles/activerecord_5.1.gemfile
 before_install: gem install bundler -v 1.10.6

Appraisals

@@ -1,11 +1,3 @@
-appraise 'activerecord-4.0' do
-  gem 'activerecord', '~> 4.0.0'
-end
-
-appraise 'activerecord-4.1' do
-  gem 'activerecord', '~> 4.1.0'
-end
-
-appraise 'activerecord-4.2' do
-  gem 'activerecord', '~> 4.2.0'
+appraise 'activerecord-5.1' do
+  gem 'activerecord', '~> 5.1.0'
 end

README.md

@@ -31,15 +31,9 @@ add_column :my_table, :parentry, :ltree
 add_column :my_table, :parent_id, :integer
 ```
 
-## Development
-
-After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
-
-To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
-
 ## Contributing
 
-Bug reports and pull requests are welcome on GitHub at https://github.com/hasghari/parentry. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](contributor-covenant.org) code of conduct.
+Bug reports and pull requests are welcome on GitHub at https://github.com/hasghari/parentry. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org/) code of conduct.
 
 
 ## License