update CHANGELOG (#70)

Co-authored-by: Nhuawei <huawei@bit-s.cn>

CHANGELOG.md

 ## Change Logs
 
+### 0.3.0
+
+- New plugins
+    - Urllib3 Plugin (#69)
+    - Elasticsearch  Plugin (#64)
+    - PyMongo Plugin (#60)
+    - Rabbitmq Plugin (#53)
+    - Make plugin compatible with Django (#52)
+    
+- API
+    - Add process propagation (#67)
+    - Add tags to decorators (#65)
+    - Add Check version of packages when install plugins (#63)
+    - Add thread propagation (#62)
+    - Add trace ignore (#59)
+    - Support snapshot context (#56)
+    - Support correlation context (#55)
+    
+- Chores and tests
+    - Test: run multiple versions of supported libraries (#66)
+    - Chore: add pull request template for plugin (#61)
+    - Chore: add dev doc and reorganize the structure (#58)
+    - Test: update test health check (#57)
+    - Chore: add make goal to package release tar ball (#54)
+    
+    
+    
 ### 0.2.0
 
 - New plugins