Repair for correct ESM with TS

[adostal]

Hello, I try switch from CommonJS to ESM Modules.
I have a problem with your library. For proper functioning, it would be necessary to add the types attribute to exports in package.json

Example @casl/ability

From:

"exports": {
    ".": {
      "import": "./dist/es6m/index.mjs",
      "require": "./dist/es6c/index.js"
    }

To:

  "exports": {
    ".": {
      "types": "./dist/types/index.d.ts",
      "import": "./dist/es6m/index.mjs",
      "require": "./dist/es6c/index.js"
    },

[stalniy]

Can you do PR for all packages?