chore: bump version for 2.0.2rc1 release

Merge pull request ably#518 from ably/release/2.0.1

Release/2.0.1

Merge pull request ably#423 from ably/integration/realtime

Merge `integration/realtime` into `main`

Merge pull request ably#495 from ably/release/2.0.0-beta.6

Release 2.0.0 beta.6

Merge pull request ably#484 from ably/release/2.0.0-beta.5

Release 2.0.0 beta.5

Merge pull request ably#469 from ably/release/2.0.0-beta.4

Release 2.0.0 beta.4

Merge pull request ably#447 from ably/release/2.0.0-beta.3

Release/2.0.0 beta.3