Release v0.3.0

What's Changed

• [no_ci][struct_pack][doc] update struct_pack document by @poor-circle in #579
• [struct_json, struct_yaml][feat]support escape during serialization by @bbbgan in #581
• fix coverage by @qicosmos in #582
• [coro_http_server][feat]support gzip by @qicosmos in #584
• [ci]test coverage by @qicosmos in #585
• [string_resize][bug]fix resize by @qicosmos in #586
• [coro_http_client][bug]fix ssl by @qicosmos in #587

New Contributors

• @bbbgan made their first contribution in #581

Full Changelog: v0.2.9...v0.3.0