recursive select calls are parsed with bad trailing_commas parameter

[tomershaniii]

The parse_projection function modifies the parsers 'options' flag, this creates different behavior when nesting select calls i.e. select(select()) which can manifest in failure to parse (see unit test)

[tomershaniii]

Thanks for the review @iffyio, changes committed per your suggestions

[tomershaniii]

With tests fixed. @iffyio