Update cosmjs and other dependencies

[Lockwarr]

Following the guide for creating and publishing an nft collection, I stumbled upon an error when instantiating the minter. The error is:
throw new Error('Invalid string. Length must be a multiple of 4') .
However the minter instance is successfully instantiated and it seems that the older cosmjs library tires to parse the response in wrong format

As discussed in discord, an alternative is to use the UI, where the experience was pretty nice.
Opening this ticket so anyone with free time and proficiency in typescript can take a look