feat: run staticcheck in serial mode

the way we collate all file arguments into their respective packages,
parallelization by pre-commit is counter-productive, as files from the
same packages can end up in different invocations of staticcheck,
resulting in the same package being run several times.

Author: valentin-krasontovitsch

.pre-commit-hooks.yaml

@@ -46,6 +46,7 @@
   files: '\.go$'
   language: "script"
   description: "Runs `staticcheck`, install https://staticcheck.io/docs/"
+  require_serial: true
 
 - id: golangci-lint
   name: "go golangci-lint"