Upgrade CRT dependency

Upgrade the **aws-crt-kotlin** version of **aws-java-crt** to pick up a version which includes [aws-c-common#923](https://github.com/awslabs/aws-c-common/pull/923) (likely [0.19.0](https://github.com/awslabs/aws-crt-java/releases/tag/v0.19.0)).