v1.8.0-rc2

[v1.8.0-rc2] - 2022-12-19

A major change in this release is re-interpreting the meaning of the xxx_timepoint field to finalized timestamp.
Thus, we can use the CKB transaction's since field to determine the l1 timestamp and to unlock l1 cells without reference to the Rollup cell. It also simplifies the finality determination of withdrawal cells.

• feat: change timepoint interpretation #897
• refactor: rename structure fields #912

We also adjust the documentation:

• doc: update Finality Mechanism Changes #913

Other changes:

• refactor: move gw-types and gw-common to gwos folder #905
• feat: support CKB built-in indexer#907