use parallelism

.drone.yml

@@ -1,7 +1,17 @@
 kind: pipeline
-name: build
+name: default
 
 steps:
+ - name: fmt
+   image: rust:1.43.0
+   commands:
+     -  rustup component add rustfmt
+     -  cargo fmt --all -- --check
+ - name: readme
+   image: msrd0/cargo-readme@sha256:2b916451e576cda54f1e02703fa092b9d5af95bcf48426a1ef42872a19467fd3
+   commands:
+     - cargo readme > ~README.md
+     - cmp -s README.md ~README.md || (printf "README.md need to be updated:\n"; cat ~README.md; exit 1)
  - name: test
    image: rust:1.43.0
    commands:
@@ -21,18 +31,4 @@ steps:
     - cargo publish --all-features
    when:
     event: tag
----
-kind: pipeline
-name: style
-
-steps:
-  - name: fmt
-    image: rust:1.43.0
-    commands:
-      -  rustup component add rustfmt
-      -  cargo fmt --all -- --check
-  - name: readme
-    image: msrd0/cargo-readme@sha256:2b916451e576cda54f1e02703fa092b9d5af95bcf48426a1ef42872a19467fd3
-    commands:
-      - cargo readme > ~README.md
-      - cmp -s README.md ~README.md || (printf "README.md need to be updated:\n"; cat ~README.md; exit 1)
+   depends_on: ["fmt", "test", "readme"]