The migrator modifies native SQL

Description

Let's look at a snippet from my migration:

$b->createTable(..., [
       <...>
            'owner_user_id' => 'bigint REFERENCES users(id) ON DELETE SET NULL', <...>
        ]);

For some reason, I get the following error:

SQLSTATE[42601]: Syntax error: 7 ERROR:  syntax error at or near ","     
  LINE 9: ...ner_user_id" bigint NULL REFERENCES users(id) ON DELETE SET, 

But if we look closely at the resulting script, or rather, a portion of it, for some unknown reason, the part with NULL has simply disappeared, resulting in a dangling SET:

  The SQL being executed was: CREATE TABLE <...>                                                                         
        "owner_user_id" bigint NULL REFERENCES users(id) ON DELETE SET,                         
        "uploaded_at" <...>
  )   

Package version

2.0.1

PHP version

8.4.18

Start with the migration snippet and generated CREATE TABLE SQL; trace the migrator's column-definition handling for REFERENCES and ON DELETE clauses, then reproduce the reported syntax error. Done means the generated SQL preserves ON DELETE SET NULL and the migration no longer produces the shown malformed statement.