Update module aws/aws-sdk-go to v1.20.13

Author: renovate-bot

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/Microsoft/go-winio v0.4.12 // indirect
 	github.com/ajg/form v1.5.1 // indirect
 	github.com/aws/aws-lambda-go v1.11.1
-	github.com/aws/aws-sdk-go v1.20.12
+	github.com/aws/aws-sdk-go v1.20.13
 	github.com/cenkalti/backoff v2.0.0+incompatible
 	github.com/certifi/gocertifi v0.0.0-20190629135335-d2eda7129713 // indirect
 	github.com/denisenkom/go-mssqldb v0.0.0-20190629141010-eb9f6a1743f3 // indirect

go.sum

@@ -28,6 +28,7 @@ github.com/aws/aws-lambda-go v1.11.1/go.mod h1:Rr2SMTLeSMKgD45uep9V/NP8tnbCcySgu
 github.com/aws/aws-sdk-go v0.0.0-20180126231901-00cca3f093a8 h1:xqzpCUtYUsmKRnKjKOmGh/kqa+zdhaCYuYAEwXzHCSY=
 github.com/aws/aws-sdk-go v0.0.0-20180126231901-00cca3f093a8/go.mod h1:ZRmQr0FajVIyZ4ZzBYKG5P3ZqPz9IHG41ZoMu1ADI3k=
 github.com/aws/aws-sdk-go v1.20.12/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.20.13/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
 github.com/cenkalti/backoff v2.0.0+incompatible h1:5IIPUHhlnUZbcHQsQou5k1Tn58nJkeJL9U+ig5CHJbY=