Improve CI

.drone.yml

@@ -4,6 +4,14 @@ type: docker
 name: default
 
 steps:
+  - name: fetch_dependencies
+    image: rust
+    volumes:
+      - name: rust_registry
+        path: /usr/local/cargo/registry
+    commands:
+      - cargo fetch
+
   - name: code_quality
     image: rust
     volumes: