Bump github.com/aws/aws-sdk-go from 1.28.9 to 1.28.13

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.28.9 to 1.28.13.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Changelog](https://github.com/aws/aws-sdk-go/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-go/compare/v1.28.9...v1.28.13)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

go.mod

@@ -5,7 +5,7 @@ go 1.13
 require (
 	github.com/Masterminds/goutils v1.1.0
 	github.com/Shopify/ejson v1.2.1
-	github.com/aws/aws-sdk-go v1.28.9
+	github.com/aws/aws-sdk-go v1.28.13
 	github.com/boltdb/bolt v1.3.1
 	github.com/docker/libkv v0.2.1
 	github.com/dustin/gojson v0.0.0-20160307161227-2e71ec9dd5ad // indirect

go.sum

@@ -42,6 +42,8 @@ github.com/aws/aws-sdk-go v1.19.18/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpi
 github.com/aws/aws-sdk-go v1.19.45/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.28.9 h1:grIuBQc+p3dTRXerh5+2OxSuWFi0iXuxbFdTSg0jaW0=
 github.com/aws/aws-sdk-go v1.28.9/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
+github.com/aws/aws-sdk-go v1.28.13 h1:JyCQQ86yil3hg7MtWdNH8Pbcgx92qlUV2v22Km63Mf4=
+github.com/aws/aws-sdk-go v1.28.13/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
 github.com/boltdb/bolt v1.3.1 h1:JQmyP4ZBrce+ZQu0dY660FMfatumYDLun9hBCUVIkF4=
 github.com/boltdb/bolt v1.3.1/go.mod h1:clJnj/oiGkjum5o1McbSZDSLxVThjynRyGBgiAx27Ps=