Bump aws-sdk from 2.912.0 to 2.918.0

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.912.0 to 2.918.0.
- [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/v2.912.0...v2.918.0)
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -1737,9 +1737,9 @@ available-typed-arrays@^1.0.2:
     array-filter "^1.0.0"
 
 aws-sdk@^2.345.0:
-  version "2.912.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.912.0.tgz#3f096b057ccc7b22ca234b44167be5c02a1daab3"
-  integrity sha512-ImeMEC014AB9DMlS3X25G+y1Q/jGDwh7kOY+5AE0PBOMjDrQOYjfiqVYbFU2nZx57Uk7UVFclOb3Lty3hEz2gg==
+  version "2.918.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.918.0.tgz#e4323de000262beb762e9c139f89e07282462f17"
+  integrity sha512-ZjWanOA1Zo664EyWLCnbUlkwCjoRPmSIMx529W4gk1418qo3oCEcvUy1HeibGGIClYnZZ7J4FMQvVDm2+JtHLQ==
   dependencies:
     buffer "4.9.2"
     events "1.1.1"