Bump aws-sdk from 2.987.0 to 2.991.0

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.987.0 to 2.991.0.
- [Release notes](https://github.com/aws/aws-sdk-js/releases)
- [Changelog](https://github.com/aws/aws-sdk-js/blob/master/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js/compare/v2.987.0...v2.991.0)

---
updated-dependencies:
- dependency-name: aws-sdk
  dependency-type: direct:development
  update-type: version-update:semver-minor
...
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -1810,9 +1810,9 @@ available-typed-arrays@^1.0.2:
     array-filter "^1.0.0"
 
 aws-sdk@^2.345.0:
-  version "2.987.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.987.0.tgz#a6e952ae3d3adf352516402d88397fbe2b9e3480"
-  integrity sha512-XgMrHWHE3aKg11D4QSlpyLvsGw6mHHiUQuowbswd11k89Q6wEfA+jMbYMC7/jsx3LrH9EKti70qhfZyw/wQIfg==
+  version "2.991.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.991.0.tgz#ba858c65cb71e1eeea39523463cf5ef258a73e8f"
+  integrity sha512-TybluMJhRBZ0h5HGupHPTfamwtsJlW56HddJpMbsIjvmh4LGupajrkEwLQYW7osFXQ1S/xuE+0QIy6vWgOpT0g==
   dependencies:
     buffer "4.9.2"
     events "1.1.1"