chore: Update ex_json_schema requirement from ~> 0.6.2 to ~> 0.10.2

Updates the requirements on [ex_json_schema](https://github.com/jonasschmidt/ex_json_schema) to permit the latest version.
- [Commits](jonasschmidt/ex_json_schema@v0.6.2...v0.10.2)

---
updated-dependencies:
- dependency-name: ex_json_schema
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

apps/api_web/mix.exs

@@ -77,7 +77,7 @@ defmodule ApiWeb.Mixfile do
       {:dialyxir, "~> 1.2", only: [:dev, :test], runtime: false},
       {:logster, "~> 1.1"},
       {:phoenix_swagger, "~> 0.8"},
-      {:ex_json_schema, "~> 0.6.2"},
+      {:ex_json_schema, "~> 0.10.2"},
       {:diskusage_logger, "~> 0.2", only: :prod},
       {:jason, "~> 1.4"},
       {:stream_data, "~> 0.5", only: :test},