chore: bump ethers, @tableland SDK & local

[dtbuchholz]

Summary

ethers released 6.12.0, which the SDK and everything else now uses. we should cut a new release for this repo as 6.1.0 and then bump the SDK's evm-tableland dep accordingly for [email protected]

Details

note: an ethers Wallet and Signer are incompatible b/w ethers 6.11.1 and 6.12.0.

How it was tested

ran tests—one change needed wrt how the new SDK catches an execution reverted issue

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules