Kebab notation S3 string is transformed to s-3

[martoc]

I use this library to transform some Cloudformation parameters names into kebab notation S3 is one of the AWS services when it's found in a parameter file it is transformed to s-3

For example LogRouterS3BucketName is translated to log-router-s-3-bucket-name

I wonder if this is an issue or it is expected by this library

[jazanne]

i've also run into this issue. I would expect/prefer the that letters/numbers not be separated

[jryannel]

See also #22