v0.7.18

This release contains a few small fixes related to edge cases in parsing EIP712 message requests. The EIP712 protocol implementation has not changed, but certain types were not being parsed correctly by the SDK.

Changelog:

• Add more validation to determine if a chainID input is a hex string or a base10 number (#155)
• Handles larger numbers when comparing base-10 vs hex strings (503f051)
• Fixes edge case in previous commit to handle very large numbers (6870e86)