Update ddtrace and ddog lib version (#71)

Author: hghotra

setup.py

@@ -29,8 +29,8 @@
  python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*, <4",
  install_requires=[
  "aws-xray-sdk==2.5.0",
- "datadog==0.32.0",
- "ddtrace==0.36.0",
+ "datadog==0.38.0",
+ "ddtrace==0.40.0",
  "wrapt==1.11.2",
  "setuptools==42.0.2",
  ],