Greets user by name

added code to greet user by name after asked for their name.

Author: bebepeng

bin/greetings.rb

@@ -0,0 +1,4 @@
+puts "What is your name?"
+name = gets.chomp!
+
+puts "Hello #{name}!"

spec/greetings_spec.rb

@@ -2,7 +2,6 @@
 
 describe "Greetings" do
   it 'asks the user for their name and outputs the customized greeting' do
-    pending
     # this is the same as typing `ruby bin/greetings.rb` at the command line
     run_script("greetings.rb")
     type("Mike")