Merge pull request pelias#140 from pelias/joxit/feat/es8

ES8: Remove bounding box query type parameter

feat(query): improve unit number sorting for fallback.housenumber que…

…ries

feat(query): remove cutoff_frequency (pelias#134)

 remove cutoff_frequency, deprecated in es7.3.0, forbidden in es8

From https://www.elastic.co/guide/en/elasticsearch/reference/8.8/migrating-8.0.html

    The cutoff_frequency parameter has been removed from the match and
    multi_match query.

    Details
    The cutoff_frequency parameter, deprecated in 7.x, has been removed
    in 8.0 from match and multi_match queries. The same functionality
    can be achieved without any configuration provided that the total
    number of hits is not tracked.

    Impact
    Discontinue use of the cutoff_frequency parameter. Search requests
    containing this parameter in a match or multi_match query will
    return an error.

Note in the above "...provided that the total number of hits is not
tracked".

`track_total_hits` does not appear in the pelias codebases, so we
shouldn't have any issues there.

Merge pull request pelias#135 from pelias/postcode-queries

improve structured geocoding postcode matching

Merge pull request pelias#125 from pelias/remove-old-multi_match

Remove old multi_match view

Merge pull request pelias#122 from pelias/allow-specifying-street-ana…

…lyzer

Allow specifying analyzer for `address_parts.street` field

Merge pull request pelias#120 from pelias/remove-nodejs-8

Drop support for Node.js 8

Merge pull request pelias#114 from pelias/joxit/feat/multi_match

Add multi_match leaf query function

Merge pull request pelias#113 from pelias/street-slop

feat(fallback queries): Support slop parameter on street queries

Merge pull request pelias#112 from pelias/fix-lib-variable-handling

fix(lib): Ensure match and match_phrase handle empty Variables