Improper handling of `to_timestamp` times

Code

    await sql`
      INSERT INTO table_name
      ${sql(inputData)}
    `

Postgres.js debug output

SQL: 
    INSERT INTO table_name
    ("start_time")values($1)

Params: [ 'to_timestamp(3213213210)' ]
node:internal/process/promises:289
            triggerUncaughtException(err, true /* fromPromise */);
            ^

RangeError: Invalid time value
    at Date.toISOString (<anonymous>)
    at Object.serialize 

Direct postgres query
select to_timestamp(3213213210); => 2071-10-27 18:13:30.000 -0500

No source file or test is named. Start by reproducing the SQL-template example and trace the serialization path shown at Object.serialize, comparing it with the direct PostgreSQL to_timestamp query. Done means the reported input no longer raises RangeError and its database behavior is covered by a regression test.