Update deps and fix dializer warnings

[ishikawa]

Updating dependent libraries and fix warnings from dialyzer.

[ishikawa]

lib/fake_http/server.ex:98:call
The function call will not succeed.

Ace.HTTP.Service.port(
  _http_service_name ::
    {:via, Registry, {_, {FakeHTTP.Server.Agent, _} | {FakeHTTP.Server.HTTPService, _}}}
)

breaks the contract
(service()) :: {:ok, :inet.port_number()}

I guess Ace.HTTP.Service.service() should be typed as GenServer.server().
https://github.com/CrowdHailer/Ace/blob/master/lib/ace/http/service.ex#L54

[ishikawa]

Gave up fixing dialyer's error 😩

[ishikawa]

Temporally changed the location.

[ishikawa]

Ref CrowdHailer/Ace#139