Supports array arguments in prepared statements

[ritalin]

Description

This PR implements in supporting an array arguments in the prepared statements (issue #447).

Usage

You can pass Javascript's array as argument for query / send method of AsyncPreparedStatement.

const stmt = await conn.prepare(`SELECT * FROM range(1, ?::int) t(id) WHERE id = ANY(?)`);
const result = await stmt.query(100, [2, 3, 5, 7, 11]); 

query / send method of PreparedStatement can also apply similarly.

Out-of -scope

It does not expand IN clause value.
For instance, WHERE foo IN (?::int[]) is not converted to such as WHERE foo IN (?, ?, ?).
If you want to use an array parameter at IN clause, you can use following:

SELECT * FROM range(1, ?::int) t(id) WHERE id IN(SELECT unnest(?))

[ritalin]

@Fil
This is type

The following is correct:

SELECT * FROM range(1, ?::int) t(id) WHERE id IN(SELECT unnest(?));

Thanks!