Test against multiple versions of Grape.

.travis.yml

@@ -0,0 +1,15 @@
+language: ruby
+
+sudo: false
+
+rvm:
+  - 2.1.1
+  - 1.9.3
+  - rbx-2.2.10
+  - jruby-19mode
+
+env:
+  - GRAPE_VERSION=0.8.0
+  - GRAPE_VERSION=0.9.0
+  - GRAPE_VERSION=0.10.1
+  - GRAPE_VERSION=HEAD

Gemfile

@@ -1,3 +1,10 @@
 source 'https://rubygems.org'
 
 gemspec
+
+case version = ENV['GRAPE_VERSION'] || '~> 0.10.0'
+when 'HEAD'
+  gem 'grape', github: 'intridea/grape'
+else
+  gem 'grape', version
+end

grape-active_model_serializers.gemspec

@@ -16,7 +16,7 @@ Gem::Specification.new do |gem|
   gem.version       = Grape::ActiveModelSerializers::VERSION
   gem.licenses      = ['MIT']
 
-  gem.add_dependency "grape", "~> 0.3"
+  gem.add_dependency "grape"
   gem.add_dependency "active_model_serializers", ">= 0.9.0"
 
   gem.add_development_dependency "rspec"