Fix node 16 cjs import

[KyleAMathews]

Fixes #2107

From running npm pack locally on PR:

The change is making exports explicit for esm or cjs:

"exports": {
  ".": {
    "import": {
      "types": "./dist/index.d.ts",
      "default": "./dist/index.mjs"
    },
    "require": {
      "types": "./dist/cjs/index.d.cts",
      "default": "./dist/cjs/index.cjs"
    }
  }
}

And generating separate type declarations.

[KyleAMathews]

diff is noisier than ideal as I ran https://www.npmjs.com/package/fixpack on the package.json

[msfstef]

Looks good, I guess? 😄 If it passes the checks then it passes them, I assume it was missing the ability to be imported via require? Also, do we need to do this for react hooks as well?

[msfstef]

I'm assuming this was the main thing that was missing for node CJS imports (?)

[KyleAMathews]

Also, do we need to do this for react hooks as well?

Strangely... no? Wait... I thought I'd checked it too but apparently not as yeah, it does have the same issue — https://arethetypeswrong.github.io/?p=%40electric-sql%2Freact%400.6.1

I'll update it as well in a little while.

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