add CI

.drone.yml

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+kind: pipeline
+type: docker
+name: default
+
+steps:
+  - name: pre-commit
+    image: iamthefij/drone-pre-commit:latest
+    commands:
+      - apt-get update && apt-get install -y cmake
+      - curl https://sh.rustup.rs -sSf | bash -s -- -y
+      - export PATH="/root/.cargo/bin:$${PATH}"
+      - pre-commit run --all-files
+  - name: test
+    image: rust:latest
+    commands:
+      - apt-get update && apt-get install -y cmake
+      - cargo build --verbose --all
+      - cargo test --verbose --all

.pre-commit-config.yaml

@@ -0,0 +1,13 @@
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.3.0
+    hooks:
+    -   id: trailing-whitespace
+    -   id: end-of-file-fixer
+    -   id: check-yaml
+    -   id: check-added-large-files
+-   repo: https://github.com/doublify/pre-commit-rust
+    rev: v1.0
+    hooks:
+    -   id: fmt
+    -   id: cargo-check