Add generic type annotations for Statement and Database get/all/each methods callback rows

[stevescruz]

Description

Small change, but some developers enjoy working with generics over the any type when using TypeScript.

Added Generics type annotations for the following methods:

• Statement.get
• Statement.all
• Statement.each
• Database.get
• Database.all
• Database.each

Backwards Compatibility

This will not break existing TypeScript code. It will still be possible to directly add type annotations to the row/rows.

Examples:

Take into consideration the following TypeScript code:

import sqlite3 from "sqlite3";

interface IUser {
    id: string;
    name: string;
    email: string;
}

const db = new sqlite3.Database("./test.db");
const createTableQuery = `CREATE TABLE IF NOT EXISTS users (
    id TEXT PRIMARY KEY NOT NULL,
    name TEXT NOT NULL,
    email TEXT NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
)`;

How type annotations currently works:
NOTE: this will still work after the code changes.

const query = "SELECT * FROM users";
db.all(query, [], (err, rows: IUser[]) => {
    if (err) {
        console.error(err.message);
    } else {
        console.log(rows[1].email);
    }
});

Now you will be able to:

const query = "SELECT * FROM users";
db.all<IUser>(query, [], (err, rows) => {
    if (err) {
        console.error(err.message);
    } else {
        console.log(rows[1].email);
    }
});

[stevescruz]

@daniellockyer thanks for running the CI pipeline.
We can add the "types" label to this PR.

[daniellockyer]

@stevescruz Nice, thanks!