Tweaks the CrossDomainMessenger.baseGas function to more accurately
reflect the actual cost of performing a deposit on L2. I've been able to
use the SDK to successfully complete deposits with these values.
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
Co-authored-by: Mark Tyneway <mark.tyneway@gmail.com>