v0.33.0

Added

• A ! before a condition negates it: !id^=isbn-|upc- matches records whose id starts with neither prefix. It works with every operator, | alternatives and dot-paths.
• Query::parse() conditions have a negated key.

Changed

• field!=x is now the same as !field=x, and a record with no value for the field counts as not matching, so a negation keeps it. != queries can return more records than before.
• Query::parse() reads != as operator = with negated: true.
• type cannot be negated, and !field!=x throws.