[sqlite] Investigate the cause of SqliteBusy error in tests (currently ignored)

[uki00a]

• This was introduced since #24.
  • In this PR, I bumped deno-sqlite from d451a28e55180730a296a9383cd5dd26155a2c11 to 73935087a1ebe9108d784503bc5474662ba54b73.
    • https://github.com/dyedgreen/deno-sqlite/compare/d451a28e55180730a296a9383cd5dd26155a2c11...73935087a1ebe9108d784503bc5474662ba54b73

  1) query builder > sub-query
       "after all" hook for "should execute sub query in joins as string (as selection)":
     SqliteError: unable to close due to unfinalized statements or unfinished backups
      at DB._error (https://deno.land/x/sqlite@73935087a1ebe9108d784503bc5474662ba54b73/src/db.js:265:16)
      at DB.close (https://deno.land/x/sqlite@73935087a1ebe9108d784503bc5474662ba54b73/src/db.js:242:18)
      at SqliteDriver.disconnect (SqliteDriver.ts:53:33)
      at Connection.close (Connection.ts:223:27)
      at test-utils.ts:278:104
      at Array.map (<anonymous>)
      at closeTestingConnections (test-utils.ts:278:36)
      at Context.<anonymous> (query-builder-subquery.ts:24:17)
      at callFn (https://unpkg.com/[email protected]/mocha.js:5420:21)
      at Hook.Runnable.run (https://unpkg.com/[email protected]/mocha.js:5407:7)

https://github.com/denolib/typeorm/blob/a23857886611354f968000a1424fc03d8bf5b319/src/driver/sqlite/SqliteDriver.ts#L56-L63