propagate return value from @Deploy decorator

e.g. this allows writing code like:

  @Deploy
  def ripgrep(**kwargs):
      return apt.packages('ripgrep', **kwargs)

  res = ripgrep()
  if res.changed:
       # do something else

pyinfra/api/deploy.py

@@ -139,6 +139,6 @@ def decorated_func(*args, **kwargs):
             data=deploy_data,
             deploy_op_order=deploy_op_order,
         ):
-            func(*args, **kwargs)
+            return func(*args, **kwargs)
 
     return decorated_func