Fix Rake warning in CI (#897)

draper.gemspec

@@ -1,4 +1,4 @@
-require File.join(__dir__, "lib", "draper", "version")
+require_relative 'lib/draper/version'
 
 Gem::Specification.new do |s|
   s.name        = "draper"
@@ -12,7 +12,6 @@ Gem::Specification.new do |s|
 
   s.files         = `git ls-files`.split("\n")
   s.test_files    = `git ls-files -- {test,spec,features}/*`.split("\n")
-  s.executables   = `git ls-files -- bin/*`.split("\n").map{ |f| File.basename(f) }
   s.require_paths = ["lib"]
 
   s.required_ruby_version = '>= 2.2.2'

spec/draper/decorator_spec.rb

@@ -693,7 +693,7 @@ module Draper
             decorator = decorator_class.new(object)
 
             # `print` private method is defined on `Object`
-            expect{ decorator.print }.not_to raise_error NoMethodError
+            expect{ decorator.print }.not_to raise_error
           end
         end
       end