341 support otp23

[kevinbader]

Description

Updated dependencies to support OTP 23. I've also replaced the versions file with .tool-versions, which makes it easier for those using the asdf package manager - just run asdf install to obtain the correct versions of Erlang and Elixir.

Closes #341

What to look out for

Dear reviewer, I want you to

• check that the code works on your machine.

Process

The goal is to improve not only the code in this PR but also our skills! The "rules":

• The review is considered "done" as soon as all reviewers have added their review, and all their comments have been addressed.
• For knowledge-sharing reviews, each reviewer should "approve" the PR after studying its content.
• After the approval, the merge is concluded by the developer.

Have fun!

[mmacai]

See bunch of warning logs during compilation, can you check them?

warning: redefining @doc attribute previously set at line 19.

Please remove the duplicate docs. If instead you want to override a previously defined @doc, attach the @doc attribute to a function head:

    @doc """
    new docs
    """
    def parse(...)

  lib/rig_cloud_events/cloud_event.ex:41: RigCloudEvents.CloudEvent.parse/1

Also some fishy logs in mix test (even though no failed test):

20:27:56.185 [error] Ranch protocol #PID<0.2243.0> of listener RigInboundGatewayWeb.Endpoint.HTTP (connection #PID<0.2148.0>, stream id 5) terminated
an exception was raised:
    ** (UndefinedFunctionError) function :stop.upgrade/4 is undefined (module :stop is not available)
        :stop.upgrade(%{bindings: %{}, body_length: 0, cert: :undefined, has_body: false, has_sent_resp: true, headers: %{"accept" => "text/event-stream", "host" => "localhost:4000", "user-agent" => "hackney/1.16.0"}, host: "localhost", host_info: :undefined, method: "GET", path: "/_rig/v1/connection/sse", path_info: :undefined, peer: {{127, 0, 0, 1}, 65049}, pid: #PID<0.2148.0>, port: 4000, qs: "subscriptions=%5B%7B%22eventType%22%3A%22greeting1%22%7D%5D", ref: RigInboundGatewayWeb.Endpoint.HTTP, scheme: "http", sock: {{127, 0, 0, 1}, 4000}, streamid: 5, version: :"HTTP/1.1"}, %{dispatch: [{:_, [], [{["_rig", "v1", "connection", "sse"], [], RigInboundGatewayWeb.V1.SSE, :ok}, {["_rig", "v1", "connection", "ws"], [], RigInboundGatewayWeb.V1.Websocket, :ok}, {:_, [], Plug.Cowboy.Handler, {RigInboundGatewayWeb.Endpoint, []}}]}], handler: RigInboundGatewayWeb.V1.SSE, handler_opts: :ok}, RigInboundGatewayWeb.V1.SSE, :no_state)
        (cowboy 2.8.0) /Users/mario.macai/elixir/rig/reactive-interaction-gateway/deps/cowboy/src/cowboy_stream_h.erl:300: :cowboy_stream_h.execute/3
        (cowboy 2.8.0) /Users/mario.macai/elixir/rig/reactive-interaction-gateway/deps/cowboy/src/cowboy_stream_h.erl:291: :cowboy_stream_h.request_process/3
        (stdlib 3.13.2) proc_lib.erl:226: :proc_lib.init_p_do_apply/3

[kevinbader]

warning: redefining @doc attribute previously set at line 19.

I didn't want to remove those lines so I turned them from docstrings into comments.

Also some fishy logs in mix test (even though no failed test):

It seems like a Cowboy issue... but I'm not sure. Do you have an idea?

[mmacai]

See there also bunch of other warnings when running mix test:

warning: incompatible types:

    :bug__query_params_unfetched !~ :ok

in expression:

    # lib/rig/authorization_check/request.ex:35
    :ok = :bug__query_params_unfetched

Conflict found at
  lib/rig/authorization_check/request.ex:35: RIG.AuthorizationCheck.Request.from_plug_conn/1

warning: Supervisor.Spec.worker/2 is deprecated. Use the new child specifications outlined in the Supervisor module instead
  lib/rig/application.ex:29: Rig.Application.start/2

warning: Supervisor.Spec.worker/2 is deprecated. Use the new child specifications outlined in the Supervisor module instead
  lib/rig/event_stream/nats_to_filter.ex:63: Rig.EventStream.NatsToFilter.supervise_nats_connection/0

warning: Supervisor.Spec.worker/3 is deprecated. Use the new child specifications outlined in the Supervisor module instead
  lib/rig/event_stream/nats_to_filter.ex:64: Rig.EventStream.NatsToFilter.supervise_nats_connection/0

Generated rig app
Excluding tags: [smoke: true, kafka: true, kinesis: true, avro: true, skip: true]

.....................................warning: variable "other_sse" is unused (if the variable is not meant to be used, prefix it with an underscore)
  test/blacklist_test.exs:64: BlacklistTest."test After blacklisting a session, active connections related to that session are terminated."/1

warning: variable "sse" is unused (if the variable is not meant to be used, prefix it with an underscore)
  test/blacklist_test.exs:59: BlacklistTest."test After blacklisting a session, active connections related to that session are terminated."/1

warning: variable "ws" is unused (if the variable is not meant to be used, prefix it with an underscore)
  test/blacklist_test.exs:61: BlacklistTest."test After blacklisting a session, active connections related to that session are terminated."/1

......warning: variable "ref" is unused (if the variable is not meant to be used, prefix it with an underscore)
  test/event_subscription_test.exs:386: RigInboundGateway.EventSubscriptionTest."test Receiving events: Adding and removing subscriptions is in effect immediately."/1

..........warning: variable "proxy" is unused (if the variable is not meant to be used, prefix it with an underscore)
  test/rig_inbound_gateway/rig/proxy_test.exs:39: RigInboundGateway.ProxyTest.test_proxy_exit/2

[mmacai]

warning: redefining @doc attribute previously set at line 19.

I didn't want to remove those lines so I turned them from docstrings into comments.

Also some fishy logs in mix test (even though no failed test):

It seems like a Cowboy issue... but I'm not sure. Do you have an idea?

It's caused by this lib/rig_inbound_gateway_web/v1/sse.ex:87, when changed to {:ok, req, :no_state} error is gone, but probably not a solution.

[mmacai]

Please also update changelog.