Move development dependencies to Gemfile

Author: byroot

.rubocop.yml

@@ -141,4 +141,7 @@ Style/HashTransformValues:
 
 Style/SymbolProc:
   Exclude:
-    - 'test/**/*'
+    - 'test/**/*'
+
+Bundler/OrderedGems:
+  Enabled: false

Gemfile

@@ -7,3 +7,5 @@ gemspec
 gem 'minitest'
 gem 'rake'
 gem 'rubocop', '~> 1.25.1'
+gem 'mocha'
+gem 'hiredis'

redis.gemspec

@@ -44,7 +44,4 @@ Gem::Specification.new do |s|
   s.executables   = `git ls-files -- exe/*`.split("\n").map { |f| File.basename(f) }
 
   s.required_ruby_version = '>= 2.5.0'
-
-  s.add_development_dependency("hiredis")
-  s.add_development_dependency("mocha")
 end