Fix link to feed

fix #98

minima.gemspec

@@ -3,20 +3,21 @@
 Gem::Specification.new do |spec|
   spec.name          = "minima"
   spec.version       = "2.1.1"
-  spec.authors       = ["Joel Glovier"]
-  spec.email         = ["jglovier@github.com"]
+  spec.authors = ["Joel Glovier"]
+  spec.email = ["jglovier@github.com"]
 
   spec.summary       = %q{A beautiful, minimal theme for Jekyll.}
-  spec.homepage      = "https://github.com/jekyll/minima"
-  spec.license       = "MIT"
+  spec.homepage = "https://github.com/jekyll/minima"
+  spec.license = "MIT"
 
   spec.metadata["plugin_type"] = "theme"
 
-  spec.files         = `git ls-files -z`.split("\x0").select do |f|
+  spec.files = `git ls-files -z`.split("\x0").select do |f|
     f.match(%r{^(assets|_(includes|layouts|sass)/|(LICENSE|README)((\.(txt|md|markdown)|$)))}i)
   end
 
   spec.add_runtime_dependency "jekyll", "~> 3.5"
+  spec.add_runtime_dependency "jekyll-feed", "~> 0.9"
   spec.add_runtime_dependency "jekyll-seo-tag", "~> 2.1"
   spec.add_development_dependency "bundler", "~> 1.12"
 end