Bump version/Changelog

Author: DarcyRaynerDD

CHANGELOG.md

@@ -1,18 +1,22 @@
-CHANGELOG
-=========
+# CHANGELOG
+
+# Version: 4 / 2019-07-23
+
+- Correctly parse trace headers with mixed casing
+
 # Version: 3 / 2019-06-18
 
-* Log metrics in a compact format
+- Log metrics in a compact format
 
 # Version: 2 / 2019-06-10
 
-* Support submitting metrics through CloudWatch Logs
-* Support submitting metrics to `datadoghq.eu`
-* Support KMS-encrypted DD API Key
-* Fix a few bugs
+- Support submitting metrics through CloudWatch Logs
+- Support submitting metrics to `datadoghq.eu`
+- Support KMS-encrypted DD API Key
+- Fix a few bugs
 
 # Version: 1 / 2019-05-06
 
-* First release
-* Support submitting distribution metrics from Lambda functions
-* Support distributed tracing between serverful and serverless services
+- First release
+- Support submitting distribution metrics from Lambda functions
+- Support distributed tracing between serverful and serverless services

datadog_lambda/__init__.py

@@ -1 +1 @@
-__version__ = "3"
+__version__ = "4"