IDL doesn't generate correct types for enum args

[dominictwlee]

The namespaced RPC method doesn't seem to create the correct type definitions for an enum arg type.

An enum is specified for instruction arg here:
https://github.com/dominictwlee/ts-enum-example-anchor/blob/master/programs/ts-enum-example/src/lib.rs#L8

However, it seems any type can be passed to that positional arg.
https://github.com/dominictwlee/ts-enum-example-anchor/blob/master/tests/ts-enum-example.ts#L13

I'm guessing the type definitions generated don't seem to enforce the correct type.

[Juici]

This should be fixed by #1726

[acheroncrypto]

Fixed in #2482.