example/queue: Application.make_handler(...) is deprecated

Thanks for the good examples.
There's warning when running `example/queue`:
`queue/runner.py:19: DeprecationWarning: Application.make_handler(...) is deprecated, use AppRunner API instead`

> python 3.7.2
> aiozipkin==0.5.0
> aiohttp==3.5.4
> aiojobs==0.2.2

Checked latest aiohttp doc., maybe need to update like this (it works without warnings):

```
# /examples/queue/runner.py
def run():
...
fe_handler = web.AppRunner(fe_app)
be_handler = web.AppRunner(be_app)
handlers = [fe_handler, be_handler]

loop_run(fe_handler.setup())
loop_run(be_handler.setup())

loop_run(loop.create_server(fe_handler.server, host, fe_port))
loop_run(loop.create_server(be_handler.server, host, be_port))
```