duplicate identifier error for identifier Token

[lmeinen]

The following code

package jwt

type Token interface{}

results in the following error in v23.02

error: got duplicate identifier Token
type Token interface{}
     ^

which seems to me to be undesired behavior.

Up until now the only workaround I've been able to find is to rename the above interface type, e.g. to JwtToken. Unfortunately, this isn't really an option in my case, as I'm working with annotated Go files and the Token type is imported from an external library. Therefore, changing the name of the stubbed type results in compilation errors and renders the annotated code unexecutable.

[jcp19]

Related to #118