update deps, convert to pure es module, replace webpack with esbuild

[mreinstein]

@anuraghazra Verly is amazing! I love it's simplicity.

I'm exploring using Verly for an upcoming project, and I have other ideas for simplifying/improving things. This is the first PR of several to see if you're open to some contributions.

thanks again for this 💎 !

[anuraghazra]

Thanks @mreinstein looks good.

Although I would prefer to use a build tool which caters to libraries like vite or rollup since I had plans to publish verly as npm library, but esbuild should work for now.

[mreinstein]

Another option is we could just eliminate the bundle entirely. These days the applications are doing the bundling, and since this is a library it's probably not that important.