Relative imports are treated as external on Windows

[gevalo1]

Current Behavior

My code isn't getting bundled because tsdx treats everything as external modules, the resulting bundle only contains the compiled index.ts file.

Expected behavior

My files shouldn't be treated as external modules.

Suggested solution(s)

Could it be something related to the external function? https://github.com/palmerhq/tsdx/blob/v0.5.7/src/utils.ts#L19

Additional context

I'm getting the following warning for all my .ts files (except the root index.ts file):

No name was provided for external module 'C:/xyz/xyz/xyz/xyz.ts' in output.globals – guessing 'xyz_ts'

Your environment

Software	Version(s)
TSDX	0.5.7
TypeScript	3.4.5
Browser	Chrome Version 74.0.3729.131
npm/Yarn	Node v10.11.0, npm 6.4.1
Operating System	Windows 10

[a-type]

Looks like a Windows problem, I'm experiencing it too.

My recommendation would be to use path.isAbsolute to avoid platform inconsistencies.

[a-type]

@jaredpalmer version v0.5.8 published on NPM doesn't appear to include this change in the distributed code.