chore: improve build

[rtritto]

Changes

• replace rimraf with tsup
• fix ESM import/export with correct extension (.mjs instead of .js):
  • related warning:

    (node:29464) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension. (Use `node --trace-warnings ...` to show where the warning was created)

  • related import error:

    SyntaxError: Cannot use import statement outside a module

  • diff of exports in package.json:

    - "require": "./dist/cjs/index.js",
    - "import": "./dist/index.js",
    - "node": "./dist/index.js",
    - "default": "./dist/index.js"
    + "types": "./dist/index.d.ts",
    + "import": "./dist/index.mjs",
    + "require": "./dist/cjs/index.js"

Sources:

• https://github.com/elysiajs/elysia
• https://github.com/elysiajs/elysia-cors