Move dependencies to Gemfile, grouped

Gemfile

@@ -2,6 +2,18 @@ source "https://rubygems.org"
 gemspec
+gem "sinatra", "~> 1.4.7"
+gem "quantile", "~> 0.2.0"
+
+group :database do
+  gem "pg", "~> 0.18.4"
+end
+
+group :redis do
+  gem "sidekiq", "~> 4.2"
+  gem "redis-namespace", "~> 1.5.2"
+end
+
 group :test do
   gem "rspec", "~>3.5"
   gem "rubocop", "~>0.42"

Gemfile.lock

 PATH
   remote: .
   specs:
-    gitlab-monitor (0.0.9)
-      pg (~> 0.18.4)
-      quantile (~> 0.2.0)
-      redis-namespace (~> 1.5.2)
-      sidekiq (~> 4.2)
-      sinatra (~> 1.4.7)
+    gitlab-monitor (0.0.10)
 GEM
   remote: https://rubygems.org/
@@ -64,8 +59,13 @@ PLATFORMS
 DEPENDENCIES
   gitlab-monitor!
+  pg (~> 0.18.4)
+  quantile (~> 0.2.0)
+  redis-namespace (~> 1.5.2)
   rspec (~> 3.5)
   rubocop (~> 0.42)
+  sidekiq (~> 4.2)
+  sinatra (~> 1.4.7)
 BUNDLED WITH
    1.13.2

gitlab-monitor.gemspec

@@ -19,12 +19,4 @@ Gem::Specification.new do |s|
   s.require_paths = ["lib"]
   s.homepage      = "http://gitlab.com"
   s.license       = "MIT"
-
-  s.add_runtime_dependency "pg", "~> 0.18.4"
-  s.add_runtime_dependency "sinatra", "~> 1.4.7"
-  s.add_runtime_dependency "quantile", "~> 0.2.0"
-  s.add_runtime_dependency "sidekiq", "~> 4.2"
-  s.add_runtime_dependency "redis-namespace", "~> 1.5.2"
-
-  s.add_development_dependency "rspec", "~> 3.3"
 end

lib/gitlab_monitor/version.rb

 module GitLab
   module Monitor
-    VERSION = "0.0.9".freeze
+    VERSION = "0.0.10".freeze
   end
 end