Tong/416 do not rollup cosmo

[supertong]

This PR reverts #68 and do not rollup @cosmjs/stargate in the bundler.

Causes

There are a few things playing together that caused the problem:

1. During next build, NextJs will try to pre-render the page and that's what the "collect page data" is doing. The code will be excuted in NodeJs runtime instead of a proper browser during the pre-render phase.
2. The rollup function from Vite will mangle the original code of libsodium-sumo which is a library dependency of @cosmjs/crypto. As a result, the crypto library wasn't properly imported and could not be executed in NodeJs.

How to narrow down the error?

Unfortunately, NextJs doesn't surface the error very well during pre-render. The actual error is

TypeError: Z.randomBytes is not a function
    at ht (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:12694:52)
    at 36836 (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:12697:37)
    at eval (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:12751:45)
    at a (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:12752:31)
    at wasm://wasm/000c792a:wasm-function[232]:0x1e7cd
    at wasm://wasm/000c792a:wasm-function[449]:0x28578
    at _e (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:12877:27)
    at eval (webpack-internal:///(ssr)/../bbn-wallet-connect/dist/index.es.js:13566:38)

The next dev command does surface the error but doesn't give much information on where to look at. This is not the fault of next dev though, it's the libsodium-sumo library actually throwing a string instead of a proper error like

throw "No secure random number generator found"

That caused some trouble to locate the actual error but with some grep|ack, it's not to hard to narrow down where it's thrown. The TTT sumo 2 at the end is how I locate the message.

Solution:
Exclude @cosmjs/stargate from rollup so that it doesn't get mangled by Vite.