Bump aws-sdk from 2.1213.0 to 2.1218.0

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.1213.0 to 2.1218.0.
- [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/v2.1213.0...v2.1218.0)

---
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

@@ -2107,9 +2107,9 @@ available-typed-arrays@^1.0.5:
   integrity sha512-DMD0KiN46eipeziST1LPP/STfDU0sufISXmjSgvVsoU2tqxctQeASejWcfNtxYKqETM1UxQ8sp2OrSBWpHY6sw==
 
 aws-sdk@^2.345.0:
-  version "2.1213.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.1213.0.tgz#efdbe52c72e6879348650ff9a69ab55ef948b6f3"
-  integrity sha512-ZfrUfhlLjwvQ6QTbg8lR4+SRFHaivzZMmfpS+64YzafcKjwc7rklYqiyh4MPTSmdNZkErgaAykYpXPMuTiWBug==
+  version "2.1218.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.1218.0.tgz#51f225b11be9a9443ea30964346018a4ca49b750"
+  integrity sha512-oreF2jKfUZ8VKnIKh8TrOOOsdSfv87jHGtWQNAHdvfeyrYK5FrnvGkHUZ3bu6g6u1gHwu5FhTPiRMbgS8Re+NA==
   dependencies:
     buffer "4.9.2"
     events "1.1.1"