Add CI config

.drone.yml

@@ -0,0 +1,29 @@
+---
+kind: pipeline
+type: docker
+name: CI
+steps:
+  - name: cargo check
+    image: rust
+    commands:
+      - cargo check
+  - name: cargo test
+    image: rust
+    commands:
+      - cargo test
+  - name: cargo format
+    image: rust
+    commands:
+      - rustup component add rustfmt
+      - cargo fmt --all -- --check
+  - name: cargo clippy
+    image: rust
+    commands:
+      - rustup component add clippy
+      - cargo clippy -- -D warnings
+
+---
+kind: signature
+hmac: cafc615f6f2200498f0bfe7eca9f3860537b7a8319f556dda9ff0565c8ead36c
+
+...