build(deps): bump github.com/aws/aws-sdk-go from 1.45.17 to 1.45.18

Bumps [github.com/aws/aws-sdk-go](https://github.com/aws/aws-sdk-go) from 1.45.17 to 1.45.18.
- [Release notes](https://github.com/aws/aws-sdk-go/releases)
- [Commits](aws/aws-sdk-go@v1.45.17...v1.45.18)

---
updated-dependencies:
- dependency-name: github.com/aws/aws-sdk-go
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

go.mod

@@ -3,7 +3,7 @@ module github.com/argoproj/pkg
 go 1.14
 
 require (
-	github.com/aws/aws-sdk-go v1.45.17
+	github.com/aws/aws-sdk-go v1.45.18
 	github.com/dustin/go-humanize v1.0.1
 	github.com/evilmonkeyinc/jsonpath v0.8.1
 	github.com/felixge/httpsnoop v1.0.3

go.sum

@@ -13,8 +13,8 @@ github.com/NYTimes/gziphandler v0.0.0-20170623195520-56545f4a5d46/go.mod h1:3wb0
 github.com/PuerkitoBio/purell v1.0.0/go.mod h1:c11w/QuzBsJSee3cPx9rAFu61PvFxuPbtSwDGJws/X0=
 github.com/PuerkitoBio/urlesc v0.0.0-20160726150825-5bd2802263f2/go.mod h1:uGdkoq3SwY9Y+13GIhn11/XLaGBb4BfwItxLd5jeuXE=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
-github.com/aws/aws-sdk-go v1.45.17 h1:EclP31IdsIVaHNgIlUtvFIDuyFUtTCa9oYthZmGlZ1U=
-github.com/aws/aws-sdk-go v1.45.17/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
+github.com/aws/aws-sdk-go v1.45.18 h1:uSOGg4LFtpQH/bq9FsumMKfZHNl7BdH7WURHOqKXHNU=
+github.com/aws/aws-sdk-go v1.45.18/go.mod h1:aVsgQcEevwlmQ7qHE9I3h+dtQgpqhFB+i8Phjh7fkwI=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
 github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=