chore(deps): update dependency cowboy to v2

[renovate]

This PR contains the following updates:

Package	Update	Change
cowboy	major	== 1.1.2 -> == 2.12.0

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Configuration

📅 Schedule: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

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• If you want to rebase/retry this PR, check this box

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[renovate]

⚠️ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻️ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you check the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: mix.lock

Command failed: docker run --rm --name=renovate_elixir --label=renovate_child -v "/mnt/renovate/gh/mike-works/phoenix-fundamentals":"/mnt/renovate/gh/mike-works/phoenix-fundamentals" -v "/tmp/renovate-cache":"/tmp/renovate-cache" -w "/mnt/renovate/gh/mike-works/phoenix-fundamentals" docker.io/renovate/elixir bash -l -c "mix deps.update cowboy"
warning: found quoted keyword "test" but the quotes are not required. Note that keywords are always atoms, even when quoted. Similar to atoms, keywords made exclusively of ASCII letters, numbers, and underscore do not require quotes
  mix.exs:52

** (Mix) Hex dependency resolution failed, change the version requirements of your dependencies or unlock them (by using mix deps.update or mix deps.unlock). If you are unable to resolve the conflicts you can try overriding with {:dependency, "~> 1.0", override: true}

[renovate]

⚠ Artifact update problem

Renovate failed to update an artifact related to this branch. You probably do not want to merge this PR as-is.

♻ Renovate will retry this branch, including artifacts, only when one of the following happens:

• any of the package files in this branch needs updating, or
• the branch becomes conflicted, or
• you click the rebase/retry checkbox if found above, or
• you rename this PR's title to start with "rebase!" to trigger it manually

The artifact failure details are included below:

File name: mix.lock

Command failed: mix deps.update cowboy
    warning: found quoted keyword "test" but the quotes are not required. Note that keywords are always atoms, even when quoted. Similar to atoms, keywords made exclusively of ASCII letters, numbers, and underscores and not beginning with a number do not require quotes
    │
 52 │      "test": ["ecto.create --quiet", "ecto.migrate", "test"]]
    │       ~
    │
    └─ mix.exs:52:7

    warning: use Mix.Config is deprecated. Use the Config module instead
    │
  6 │ use Mix.Config
    │ ~~~~~~~~~~~~~~
    │
    └─ config/config.exs:6

    warning: Mix.Config.config/2 is deprecated. Use the Config module instead
    │
  9 │ config :eblog,
    │ ~~~~~~~~~~~~~~
    │
    └─ config/config.exs:9

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 13 │ config :eblog, Eblog.Endpoint,
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/config.exs:13

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 21 │ config :logger, :console,
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/config.exs:21

    warning: Mix.Config.import_config/1 is deprecated. Use the Config module instead
    │
 27 │ import_config "#{Mix.env}.exs"
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/config.exs:27

    warning: use Mix.Config is deprecated. Use the Config module instead
    │
  1 │ use Mix.Config
    │ ~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:1

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
  9 │ config :eblog, Eblog.Endpoint,
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:9

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 19 │ config :eblog, Eblog.Endpoint,
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:19

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 30 │ config :logger, :console, format: "[$level] $message\n"
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:30

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 34 │ config :phoenix, :stacktrace_depth, 20
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:34

    warning: Mix.Config.config/3 is deprecated. Use the Config module instead
    │
 37 │ config :eblog, Eblog.Repo,
    │ ~~~~~~~~~~~~~~~~~~~~~~~~~~
    │
    └─ config/dev.exs:37

** (Mix) Hex dependency resolution failed