Bump aws-sdk from 2.863.0 to 2.868.0

Bumps [aws-sdk](https://github.com/aws/aws-sdk-js) from 2.863.0 to 2.868.0.
- [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/v2.863.0...v2.868.0)
Signed-off-by: dependabot[bot] <support@github.com>

yarn.lock

@@ -1628,9 +1628,9 @@ available-typed-arrays@^1.0.2:
     array-filter "^1.0.0"
 
 aws-sdk@^2.345.0:
-  version "2.863.0"
-  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.863.0.tgz#602d244a947ce31c8d84de73f9a5b74e7cb95f5b"
-  integrity sha512-krr0047EOl9qpRdhPoyYxI7+viVUpX+t+Vjbf+alXdOE172DC+hFi8y6egIM1xVV4KkMFm0y0EykBWgA93XNNA==
+  version "2.868.0"
+  resolved "https://registry.yarnpkg.com/aws-sdk/-/aws-sdk-2.868.0.tgz#2c31f5d788e4487ac29f51498e46cc91b0d1de6a"
+  integrity sha512-ZayPsA/ycaAXqqa2oDyf8iUpl1WOLODZS8ZdvYj77L5owMQm0XC7yqiD+WHj9nToUECF9VAD+AKQMIN6695tVQ==
   dependencies:
     buffer "4.9.2"
     events "1.1.1"