Add packaging as a required package for pika instrumentation (#882)

Fixes #881

Author: phillipuniverse

CHANGELOG.md

@@ -7,6 +7,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased](https://github.com/open-telemetry/opentelemetry-python/compare/v1.9.0-0.28b0...HEAD)
 
+### Fixed
+
+- `opentelemetry-instrumentation-pika` requires `packaging` dependency
+
+
 ## [1.9.0-0.28b0](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.9.0-0.28b0) - 2022-01-26
 
 

instrumentation/opentelemetry-instrumentation-pika/setup.cfg

@@ -43,6 +43,7 @@ packages=find_namespace:
 install_requires =
     opentelemetry-api ~= 1.5
     wrapt >= 1.0.0, < 2.0.0
+    packaging >= 20.0
 
 [options.extras_require]
 test =