Update boto3 requirement from ~=1.16.31 to ~=1.16.42 (#679)

dependabot[bot] · web-flow · commit 728ab3bb2a1f · 2020-12-23T10:19:57.000+01:00
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
@@ -1,4 +1,4 @@
-boto3~=1.16.31
+boto3~=1.16.42
 cryptography==3.3.1
 marshmallow==3.9.1
 packaging==20.8
