Return range instead of position

[PMunch]

Nimsuggest currently only returns positions for symbols, errors, etc. This means that some editors ends up doing things like this: https://github.com/pragmagic/vscode-nim/blob/master/src/nimMain.ts#L146 in order to try and convert a position to a range. Would this be possible to do better directly in Nimsuggest?

[Araq]

Probably, even though we don't have range information in the compiler either.