Deparse error with ON CONFLICT DO NOTHING

[ChrisJohnNewton]

I received this error stack trace while deparsing the following SQL:

INSERT INTO
  public.people (id, name, epithet, is_great, gender, type_id, date_of_birth, date_of_death, place_of_birth, place_of_death, biography, canonical_status_id, image_url, source_url)
VALUES
  (1, 'Asterius', 'of Amasea', FALSE, 'M', 1, '0350-01-01', '0410-01-01', 'Cappadocia', 'Amasea', NULL, 1, NULL, NULL),
  (2, 'Ausonius', NULL, FALSE, 'M', 1, '0310-01-01', '0395-01-01', 'Burdigala', NULL, NULL, NULL, NULL, NULL)
ON CONFLICT DO NOTHING;

/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:1231
            if (clause.infer.indexElems) {
                             ^

TypeError: Cannot read properties of undefined (reading 'indexElems')
    at Deparser.InsertStmt (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:1231:30)
    at Deparser.deparse (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:281:26)
    at Deparser.RawStmt (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:285:25)
    at Deparser.deparse (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:281:26)
    at /Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:161:33
    at Array.map (<anonymous>)
    at Deparser.deparseQuery (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:161:14)
    at deparse (/Users/chris/Documents/catholica/node_modules/pgsql-deparser/main/deparser.js:146:42)
    at file:///Users/chris/Documents/catholica/database/seeders/seed.js:28:19

Line 1231

It doesn't seem to like the ON CONFLICT DO NOTHING and clause has no infer property. I've fixed it locally with an optional chain after infer for both the if (line 1231) and else if (line 1236).