grim/convey

Update to Go 1.21 and use some new helpers

5 months ago, Elliott Sales de Andrade
adb6eb2a7d21
Update to Go 1.21 and use some new helpers

`strings.Cut` was added in 1.18, and `maps`/`slices` in 1.21.

Testing Done:
Ran `go test ./...`

Reviewed at https://reviews.imfreedom.org/r/2870/
package docker
import (
"errors"
)
var (
errDetachRemoved = errors.New("the detach attribute was removed in convey 0.15.0")
errHealthCheckRemoved = errors.New("the healthcheck attribute was removed in convey 0.15.0")
)