chore(deps): update elixir docker tag

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| postgres | docker | major | `14.8-alpine` -> `15.3-alpine` |
| postgres |  | major | `14.8-alpine` -> `15.3-alpine` |

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNC4xMTIuMCIsInVwZGF0ZWRJblZlciI6IjM0LjExMi4wIn0=-->

Reviewed-on: #31
Co-authored-by: renovate-bot <renovate-bot@dubas.dev>
Co-committed-by: renovate-bot <renovate-bot@dubas.dev>

.drone.yml

@@ -9,7 +9,7 @@ trigger:
 
 steps:
   - name: database healthcheck
-    image: 'postgres:14.5-alpine'
+    image: 'postgres:15.3-alpine'
     environment:
       PGUSER: postgres
       PGPASSWORD: postgres
@@ -75,7 +75,7 @@ steps:
 
 services:
   - name: db
-    image: 'postgres:14.5-alpine'
+    image: 'postgres:15.3-alpine'
     environment:
       POSTGRES_USER: postgres
       POSTGRES_PASSWORD: postgres

.tool-versions

@@ -1,2 +1,2 @@
 erlang 24.3.4
-elixir 1.14.5
+elixir 1.15.0

docker-compose.yml

@@ -3,7 +3,7 @@ version: '3.7'
 
 services:
   db:
-    image: 'postgres:14.5-alpine'
+    image: 'postgres:15.3-alpine'
     hostname: &db_host db
     init: true
     environment: