Add Drone CI

.drone.yml

@@ -0,0 +1,15 @@
+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: build
+    image: rust:1.67
+    commands:
+      - cargo build
+
+  - name: test
+    image: rust:1.67
+      - cargo test
+    depends_on:
+      - build