metadata doesn't report internal functions from modules

[AlbertoCentonze]

Version Information

• vyper Version (output of vyper --version): 0.4.0

What's your issue about?

If contract A.vy contains an internal function foo and contract B.vy contains an external function bar that is imported in A.vy and called internally:

vyper -f metadata B.vy

will not report the function foo from A.vy

[charles-cooper]

this should be fixed in #4328