Updated version needed of bundler (downgrade_ to 1.7.

apex-aprs.gemspec

@@ -32,7 +32,7 @@ Gem::Specification.new do |spec|
     spec.add_dependency 'abstraction', '~> 0.0.4'
     spec.add_dependency 'json', '~> 1.8'
     spec.add_dependency 'kiss-tnc', '~> 1.0'
-    spec.add_development_dependency 'bundler', '~> 1.13'
+    spec.add_development_dependency 'bundler', '~> 1.7'
     spec.add_development_dependency 'rake', '~> 11.3'
     spec.add_development_dependency 'rdoc', '~> 4.2'
     spec.add_development_dependency 'aruba', '~> 0.14'