tl1.gemspec in tl1-0.1.0 vs tl1.gemspec in tl1-0.2.0

@@ -1,7 +1,8 @@
 # frozen_string_literal: true
-lib = File.expand_path('../lib', __FILE__)
+
+lib = File.expand_path('lib', __dir__)
 $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 require 'tl1/version'
 
 Gem::Specification.new do |spec|
   spec.name          = 'tl1'
@@ -18,9 +19,9 @@
   end
   spec.bindir        = 'exe'
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_development_dependency 'bundler', '~> 1.14'
-  spec.add_development_dependency 'rake', '~> 10.0'
+  spec.add_development_dependency 'rake'
   spec.add_development_dependency 'rspec', '~> 3.0'
+  spec.add_development_dependency 'rubocop', '~> 0.54' if RUBY_VERSION > '2.1'
 end