chore(deps): update elixir docker tag to v1.14.0 (#21)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| elixir | docker | minor | `1.13.4` -> `1.14.0` |
| elixir |  | minor | `1.13.4` -> `1.14.0` |

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #21
Co-authored-by: renovate-bot <renovate-bot@dubas.dev>
Co-committed-by: renovate-bot <renovate-bot@dubas.dev>

.drone.yml

@@ -37,7 +37,7 @@ steps:
       restore: true
 
   - name: test
-    image: 'elixir:1.13.4'
+    image: 'elixir:1.14.0'
     environment:
       MIX_ENV: test
       POSTGRES_HOST: db
@@ -48,7 +48,7 @@ steps:
       - make test
 
   - name: lint
-    image: 'elixir:1.13.4'
+    image: 'elixir:1.14.0'
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - make static_code_analysis