v0.40.0

This release features a complete overhaul of the join mechanism.

Added

• #277: A table selector can now have an alias. This in and of itself is not
  particularly useful, but it's a building block for multiple joins.

  $ sq '@sakila | .actor:a | .a.first_name'

• New option result.column.rename that exposes a template used to rename
  result set column names before display. The primary use case is to de-duplicate
  columns names on a SELECT * FROM tbl1 JOIN tbl2, where tbl1 and tbl2
  have clashing column names (docs).

• #157: Previously only join (INNER JOIN) was available: now the rest of
  the join types such as left_outer_join, cross_join, etc. are
  implemented (docs).

Changed

• ☢️ #12: The table join mechanism has been
  completely overhauled. Now there's support for multiple joins. See docs.

  # Previously, only a single join was possible
  $ sq '.actor, .film_actor | join(.actor_id)'
  
  # Now, an arbitrary number of joins
  $ sq '.actor | join(.film_actor, .actor_id) | join(.film, .film_id)'

• ☢️ The alias for --jsonl (JSON Lines) has been changed to -J.

Fixed

• Fixed bug where config options weren't being propagated correctly.