keep_up.gemspec in keep_up-0.6.3 vs keep_up.gemspec in keep_up-0.7.0

@@ -1,6 +1,8 @@
-lib = File.expand_path('../lib', __FILE__)
+# frozen_string_literal: true
+
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'keep_up/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'keep_up'
@@ -20,12 +22,14 @@
 
   spec.bindir        = 'bin'
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_runtime_dependency 'bundler', '~> 1.13'
+  spec.required_ruby_version = '>= 2.3.0'
 
+  spec.add_runtime_dependency 'bundler', '~> 1.15'
+
   spec.add_development_dependency 'aruba', '~> 0.14.2'
-  spec.add_development_dependency 'pry'
   spec.add_development_dependency 'rake', '~> 12.0'
   spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'simplecov', '~> 0.16.1'
 end