Update boto3 requirement from ~=1.14.10 to ~=1.15.12 (#583)

dependabot[bot] · web-flow · commit ba4a8be8de2a · 2020-10-05T23:42:24.000+02:00
diff --git a/requirements/requirements.txt b/requirements/requirements.txt
@@ -1,4 +1,4 @@
-boto3~=1.14.10
+boto3~=1.15.12
 marshmallow==3.7.1
 PyYAML>=5.1,<5.4
 requests==2.24.0
