Merge pull request #771 from mmukherjee/master

updated the example so as to make it a working example

README.md

@@ -54,7 +54,7 @@ the associated ChefSpec test might look like:
 require 'chefspec'
 
 describe 'example::default' do
-  let(:chef_run) { ChefSpec::SoloRunner.converge(described_recipe) }
+  let(:chef_run) { ChefSpec::SoloRunner.new(platform: 'ubuntu', version: '16.04').converge(described_recipe) }
 
   it 'installs foo' do
     expect(chef_run).to install_package('foo')