fix: Upgrade aws-encryption-sdk dependency (aws-cloudformation#186)

* fix: Upgrade aws-encryption-sdk dependency

Author: Brianwithay21

src/setup.py

@@ -15,7 +15,7 @@
     python_requires=">=3.6",
     install_requires=[
         "boto3>=1.10.20",
-        "aws-encryption-sdk==2.2.0",
+        "aws-encryption-sdk==3.1.0",
         'dataclasses;python_version<"3.7"',
     ],
     license="Apache License 2.0",