add clippy

.drone.yml

@@ -11,6 +11,8 @@ steps:
   - echo -e '[target.x86_64-pc-windows-gnu]\nlinker = "x86_64-w64-mingw32-gcc"\nar = "x86_64-w64-mingw32-gcc-ar"' > ~/.cargo/config
   - rustup toolchain install stable-x86_64-pc-windows-gnu
   - rustup target add x86_64-pc-windows-gnu
+  - rustup component add clippy
+  - cargo clippy
   - cargo build --release --target x86_64-pc-windows-gnu
   - curl -u drone:$MVN_PWD -X POST 'https://nexus.nyyu.dev/service/rest/v1/components?repository=maven-releases' -F maven2.groupId=dev.nyyu -F maven2.artifactId=cggitem_sets -F maven2.version=$(awk -F ' = ' '$1 ~ /version/ { gsub(/["]/, "", $2); printf("%s",$2) }' Cargo.toml)-$(date +%Y%m%d%H%M%S) -F maven2.asset1=@target/x86_64-pc-windows-gnu/release/cggitem_sets.exe -F maven2.asset1.extension=exe
   environment: