Hi Everybody,

it would be great to have stringer works with different case styles like
-case=toUpper
-case=toLower
-case=title
using the strings function
https://golang.org/pkg/strings/#ToUpper
https://golang.org/pkg/strings/#ToLower
https://golang.org/pkg/strings/#Title
(also in combination with "trim-prefix")

What version of Go are you using (go version)?

$ go version 1.13

Does this issue reproduce with the latest release?

Feature Request, yes

What operating system and processor architecture are you using (go env)?

$ go env
...
set GOHOSTARCH=amd64
set GOHOSTOS=windows
...

What did you do?

type SomeType uint32
go:generate stringer -type=SomeType -trimprefix=SomeType
const (
SomeTypeZero SomeType  = 0
SomeTypeOne SomeType  = 1
SomeTypeTwo SomeType  = 2
)

What did you expect to see?

fmt.println(SomeTypeZero ) --> "zero" or "ZERO" 

What did you see instead?

"Zero"