Exported types not defined in entry point (`src/init.luau`) are not correctly exported

[Ransomwave]

NamedSignal gets a lot of its types from src/Types, a dedicated types module.

In this case, LPM didn't export the Types module so Luau has no clue that Types.DefaultSignature is.

My lpm.toml:

# Manifest for this project. See https://luaupm.com/docs
# Add dependencies with `lpm add <scope/name>`, then run `lpm install`.

[dependencies]
namedsignal = { name = "nowoshire/namedsignal", version = "^", index = "wally" }

[indices]
wally = "https://github.com/UpliftGames/wally-index"