fix drawRectangle to handle rotation correctly

[MatheusrdSantos]

What?

Fix drawRectangle to handle rotation correctly

Why?

to fix the issue reported here: #61

How?

Testing?

const fs = require('fs');
const pdf = require('@cantoo/pdf-lib');
run();
async function run() {
	const doc = await pdf.PDFDocument.create();
	const page = doc.addPage();
	page.drawRectangle({x: 20, y: 200, width: 100, height: 50, rotate: pdf.degrees(45)});
	fs.writeFileSync('bugreport.pdf', await doc.save());
}

New Dependencies?

Screenshots

before(left) and after(right)