Arbitrum Nitro Contracts v1.3.0-beta.0

What's Changed

• refactor: move machine hash logic to osp by @gzeoneth in #172
• add audit ci; update / allowlist dependencies; update waffle tests for v4 [v2] by @DZGoldman in #144
• Add contract to test pending block's time and number advance by @ganeshvanahalli in #133
• fix: audit ci by @gzeoneth in #152
• update yarn audit: OZ by @DZGoldman in #157
• Add Slither to CI by @gvladika in #148
• Add function to test if arbBlockHash on pending block returns latest by @ganeshvanahalli in #159
• Add script for deploying rollups to local test node by @gvladika in #161
• Properly calculate and configure validator addresses by @gvladika in #174

Full Changelog: v1.2.1...v1.3.0-beta.0