feat: upgrade elixir and erlang

* elixir from 1.14.5 to 1.15.4
* erlang from 24.3.4 to 26.0.2

.drone.yml

@@ -37,7 +37,7 @@ steps:
       restore: true
 
   - name: test
-    image: 'elixir:1.14.5-slim'
+    image: 'elixir:1.15.4-slim'
     environment:
       MIX_ENV: test
       POSTGRES_HOST: db
@@ -48,7 +48,7 @@ steps:
       - make test
 
   - name: lint
-    image: 'elixir:1.14.5-slim'
+    image: 'elixir:1.15.4-slim'
     commands:
       - mix do local.rebar --force, local.hex --force, deps.get, deps.compile
       - make static_code_analysis

.tool-versions

@@ -1,2 +1,2 @@
-erlang 24.3.4
-elixir 1.15.0
+erlang 26.0.2
+elixir 1.15.4

docker-compose.yml

@@ -13,7 +13,7 @@ services:
       - 'db_data:/var/lib/postgresql/data'
     restart: unless-stopped
   app:
-    image: 'elixir:1.14.5-slim'
+    image: 'elixir:1.15.4-slim'
     hostname: app
     depends_on:
       - db