setup is defined but never used

[QuentinRoy]

Usage of p5 is mostly incompatible with the no-unused-vars rules at the moment because all globally exported functions will trigger an error.

It is possible to partially solve this using the varsIgnorePattern option. For example, here is my configuration file:

module.exports = {
  extends: ["eslint:recommended", "p5js"],
  env: { browser: true },
  rules: {
    "no-unused-vars": [
      "error",
      { varsIgnorePattern: "setup|draw|preload|mousePressed|keyPressed" },
    ],
  },
};

Of course I am missing a lot of events, I just added the one I am currently using. Unfortunately, I am lacking time for a PR, but I thought it might be of interest and relatively easy to implement.

The tradeoff is that I believe any variables called setup is going to be ignored. I don't think it has to be global.