misc: Use dd-trace-py 0.61.1 (#227)

Upgrade `ddtrace` dependency to the latest available `0.x` version at
the moment.

Author: adamantike

poetry.lock

@@ -26,7 +26,7 @@ classifiers = [
 python = ">=3.6.0,<4"
 datadog = "^0.41.0"
 wrapt = "^1.11.2"
-ddtrace = "^0.59.2"
+ddtrace = "^0.61.1"
 importlib_metadata = {version = "^1.0", python = "<3.8"}
 boto3 = { version = "^1.10.33", optional = true }
 typing_extensions = {version = "^4.0", python = "<3.8"}