Adds the typescript source to the npm package. The source is 700k uncompressed, but is dwarfed by all of the native artifacts so this doesn't seem like a size regression on its face. It may trigger a publish failure in the size checker though. Addresses https://github.com/awslabs/aws-crt-nodejs/issues/358
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.