registerSpace function not found - from README instructions

[orpheuslummis]

I'm trying to use w3up for a project following these instructions: https://github.com/web3-storage/w3up/tree/main/packages/w3up-client.
I've obtainedregisterSpace function not found.
(I've also obtained other errors...)

### Tasks
- [ ] https://github.com/web3-storage/w3up/pull/1214
- [ ] @orpheuslummis to try out https://web3.storage/docs/w3up-client/#create-and-provision-a-space

[gobengo]

@orpheuslummis Hey there. Thanks for reporting this. The registerSpace method on the client was recently removed in the latest major version of the library, but we forgot to update the README! I just removed mention of registerSpace via #1214 and created this for further corrections of the README #1215

The best docs to use for this right now are:

• guide: https://web3.storage/docs/w3up-client/#create-and-provision-a-space
• reference api docs for the w3up Client class: https://web3-storage.github.io/w3up/classes/_web3_storage_w3up_client.Client.html

[gobengo]

@orpheuslummis I'm going to close this in hopes we've resolve the issue, but feel free to reopen it if you'd like to keep discussing it