Update CHANGELOG and rev to v2.1.0 (#98)

Author: basepi

CHANGELOG.md

@@ -1,6 +1,6 @@
 # Changelog
 
-## 2.1.0 (unreleased)
+## 2.1.0 (2023-08-16)
 
 - Add support for `service.environment` from APM log correlation ([#96](https://github.com/elastic/ecs-logging-python/pull/96))
 - Fix stack trace handling in StructLog for ECS compliance ([#97](https://github.com/elastic/ecs-logging-python/pull/97))

ecs_logging/__init__.py

@@ -20,7 +20,7 @@
 from ._stdlib import StdlibFormatter
 from ._structlog import StructlogFormatter
 
-__version__ = "2.0.2"
+__version__ = "2.1.0"
 __all__ = [
     "ECS_VERSION",
     "StdlibFormatter",