Merge pull request #10 from ehelms/allow-puma-4

Fixes #8 - Allow Puma 4.Y

Author: sj26

puma-plugin-systemd.gemspec

@@ -10,7 +10,7 @@ Gem::Specification.new do |spec|
 
   spec.files = Dir["lib/**/*.rb", "README.md", "LICENSE"]
 
-  spec.add_runtime_dependency "puma", "~> 3.6"
+  spec.add_runtime_dependency "puma", ">= 3.6", "< 5"
   spec.add_runtime_dependency "json"
 
   spec.add_development_dependency "bundler", "~> 1.13"