- Bumped version from v0.20.6 to v0.21.0.
- Added a `complete` map in the Client struct to track subscription completion status.
- Improved event handling in the read loop to manage EOSE messages and subscription closures.
- Introduced new tests for filtering, event ordering, and subscription behaviors, enhancing test coverage and reliability.
- Introduced a new `relaytester` package to facilitate testing of relay functionalities.
- Implemented a `TestSuite` structure to manage and execute various test cases against the relay.
- Added multiple test cases for event publishing, retrieval, and validation, ensuring comprehensive coverage of relay behavior.
- Created utility functions for generating key pairs and events, enhancing test reliability and maintainability.
- Established a WebSocket client for interacting with the relay during tests, including subscription and message handling.
- Included JSON formatting for test results to improve output readability.
- This commit lays the groundwork for robust integration testing of relay features.
