Use URI#parse instead of URI#new, because the former exists and t…

…he latter doesn't.

lib/google-safe-browsing-lookup.rb

@@ -122,7 +122,7 @@ def canonical(url='')
 			url = "http://#{url}"
 		end
 
-		uri = URI.new(url)
+		uri = URI.parse(url)
 
 		return uri.to_s
 	end