Export version number from package

Something like this:

```js
const Frint = require('frint');
console.log(Frint.version); // 2.2.0
```

That way, we can know while debugging in the browser what version we are dealing with quickly.

(I currently have no idea how this can be done)

Start by tracing the package's public entry point and how its version is defined in the package metadata. The change is done when consumers can read the installed version through Frint.version as shown in the issue, with existing package checks still passing.

Written by the indexing model from the issue text.