Indices Endpoints

What's Changed

• Added options demo scripts by @justinpolygon in #390
• Fix for failing dependabot PRs by @justinpolygon in #395
• Bump orjson from 3.8.3 to 3.8.7 by @dependabot in #396
• Bump types-setuptools from 65.6.0.2 to 67.4.0.3 by @dependabot in #393
• Bump mypy from 0.991 to 1.0.1 by @dependabot in #400
• make spec gen by @antdjohns in #402
• ws and rest indices by @antdjohns in #401
• add last trade by @aitzkovitz in #404

Full Changelog: v1.7.2...v1.8.0