allow for higher versions of rails (#32)

Author: nathan-salazar

Gemfile

@@ -14,4 +14,4 @@ gemspec
 # To use a debugger
 # gem 'byebug', group: [:development, :test]
 
-gem "rails", "~> 5.1"
+gem "rails", ">= 5.1"

demux.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |spec|
   spec.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.md"]
 
   spec.add_dependency "jwt", ">= 1.5", "< 3"
-  spec.add_dependency "rails", "< 7", ">= 5.1"
+  spec.add_dependency "rails", ">= 5.1"
 
   spec.add_development_dependency "pg"
   spec.add_development_dependency "rubocop"