Add helper to parse different GA-Session cookie values

What's Changed

• build(deps): bump actions/checkout from 5 to 6 by @dependabot[bot] in #105
• build(deps): bump actions/cache from 4 to 5 by @dependabot[bot] in #107
• Parse Session ID from GA cookies by @tobz-nz in #108

Full Changelog: v2.1.1...v2.1.2