Merge branch 'master' into rocket

.drone.yml

@@ -0,0 +1,12 @@
+kind: pipeline
+name: default
+
+steps:
+- name: build
+  image: rustlang/rust:nightly-alpine
+  commands:
+  - apk add --no-cache musl-dev
+  - cargo fetch
+  - cargo build --all
+  environment:
+    CARGO_REGISTRIES_CRATES_IO_PROTOCOL: sparse