Could you please add a way to specify the --no-subset-tables option?

[Taikono-Himazin]

I've tried using this to subset the font.
However, an error related to FFTM occurred and conversion could not be performed.
I found that specifying --no-subset-tables works around this.
But this had no way of specifying it.
I got around it by changing the code and adding this line to create-subset.js.

module.exports = async function createSubset({
  fontFile,
  unicodeRange,
  flavor,
  outputFile,
}) {
  const flags = [
    flavor ? ` --flavor="${flavor}"` : '',
    unicodeRange ? ` --unicodes="${unicodeRange}"` : '',
    outputFile ? ` --output-file="${outputFile}"` : '',
    ` --no-subset-tables+="FFTM"`,   // add this line.
  ];

  const command = `pyftsubset ${fontFile}${flags.join('')}`;
  const { stderr } = await exec(command);
  const { size } = await fsStat(outputFile);

  if (stderr) {
    throw stderr;
  }

  // eslint-disable-next-line no-console
  console.log('+ ', `${outputFile} - ${fileSize(size)}`);
};

But I think there is a better way.
But I didn't know how. (I'm not familiar with node.js.)
So it's a suggestion. Could you please add a way to specify --no-subset-tables.
I wanted to make a pull request, but I couldn't write code that worked. sorry.