pageAdded event not called for first page with autoFirstPage: true

[nstdspace]

Bug Report

See title.

const pdf = new PDFDocument();
pdf.on("pageAdded", () => {
    pdf.text("header");
  });

This code will not add the text "header" on the first page as expected. The first by default auto generated page does not
leed to the event "pageAdded" being invoked, thus the callback does not run.

• pdfkit version: 0.15.0
• Node version: v20.11.0
• Browser version (if applicable): serverless (nuxt)
• Operating System: Mac OS