returnVersion should not swallow errors

[sohkai]

Users should swallow them, rather than doing so by default.

For example, getAllVersions() should be adding the .catch(() => {}) when it launches promises.

[bingen]

Hey @sohkai , I think this is solved with this commit: c7ccb56
Do you think we can close this issue?
Cc: @izqui

[sohkai]

It's still swallowing the error, but at least we're providing a default. Let's close it until we realize we need better error handling.