v0.0.18-13

What's Changed

• docs: l1->l2 message fees by @ArielElp in #52
• docs: Added fields for 1.0 invoke transaction by @stoobie in #53
• docs: nonce in on chain data and the state definition by @ArielElp in #54
• docs: update transaction hash computation by @ArielElp in #56
• fix: bump version by @ArielElp in #57

Full Changelog: v0.0.18-11...v0.0.18-13