Update boto3 requirement from ~=1.16.25 to ~=1.16.31 (#654)

dependabot[bot] · web-flow · commit 4993443bce6c · 2020-12-08T13:44:16.000+01:00
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
@@ -1,4 +1,4 @@
-boto3~=1.16.25
+boto3~=1.16.31
 cryptography==3.2.1
 marshmallow==3.9.1
 packaging==20.7
