Undocumented breaking change in v8.0+

[sadiqkhoja]

I was using v3.9 for a long time but recently decided to upgrade to the latest version (10.0). My code started to break down because I was passing Buffer to the parser.write. Following is the small reproducible code:

const { Parser } = require('htmlparser2');

const parser = new Parser({
  onopentag(name, attributes) {
    console.log(`Opening tag: ${name}`);
  },
  ontext(text) {
    console.log(`Text: ${text}`);
  },
  onclosetag(name) {
    console.log(`Closing tag: ${name}`);
  },
  onerror(err) {
    console.error('Parser error:', err.message);
  }
});

const htmlBuffer = Buffer.from('<div>Hello World</div>');

try {
  console.log('Attempting to write Buffer to parser...');
  parser.write(htmlBuffer);
  parser.end();
} catch (error) {
  console.error('Caught error:', error.message);
}

Above code returns this.buffer.charCodeAt is not a function for all versions about 8.0. For any version below 8.0, it returns ```
Opening tag: div
Text: Hello World
Closing tag: div

I don't if the change in behaviour is intentional or not. However I feel either release notes should be updated or type of the argument of the `write()` should be documented in the readme file.