Determine submodule and Solidity versions

[minghinmatthewlam]

Context and scope
Determine whether to fix versions like submodule, versions for contracts, and how those dependencies interact with dependabot.

Discussion and alternatives
Do we need to need to ignore any of the dependabot prs for the versions we decide to fix.
for example: #25 and #24

Open questions

[geoff-vball]

I'm undecided on whether it's a good idea, but we can use the version of forge-std that is included in as a submodule in teleporter. It should be as simple as changing the path remappings.txt