Release as modern code

[fregante]

It's 2022 and most users no longer need babel. Those who do probably already have a setup to transpile node_modules to their specific needs. What do you think about releasing a new breaking version dropping babel? There's a lot of unnecessary/slow code here:

https://unpkg.com/browse/dom-form-serializer@2.0.0/dist/dom-form-serializer.mjs

It would be a good time to also include an exports map (which is also a breaking change) as described in https://www.typescriptlang.org/docs/handbook/esm-node.html#packagejson-exports-imports-and-self-referencing

{
    "name": "dom-form-serializer",
    "type": "module",
    "exports": {
        ".": {
            // Entry-point for `import "my-package"` in ESM
            "import": "./dist/dom-form-serializer.js",
            // Entry-point for `require("my-package") in CJS
            "require": "./dist/dom-form-serializer.cjs",
            // Types from https://github.com/jefersondaniel/dom-form-serializer/issues/11
            "types": "./dist/dom-form-serializer.d.ts",
        },
    },
    // CJS fall-back for older versions of Node.js
    "main": "./dist/dom-form-serializer.cjs",
}

[jefersondaniel]

My focus on this library was to make something slim, so I'm OK with launching a new major version dropping babel support. I'm very busy these days but I'm open to PRs.