Handler path separator incorrect on windows

[justin-gerhardt]

The Lambda handler path is set using path.join which uses the native system path separator. Using the windows path separator causes lambda to fail to import the handler.

[pselle]

@justin-gerhardt Thank you for the report! Can you please describe some replication steps? Are you running sls invoke local or are you seeing this issue when you deploy to Lambda?

[justin-gerhardt]

The issue occurs whenever attempting to deploy to lambda from windows. It should be fixable by changing line 403 of index.js to use path.posix.join rather than path.join.

[pselle]

@justin-gerhardt Thanks, that makes sense now (that it compiles to a Windows-friendly, but then that's not Lambda-friendly). We'll put this on the queue, but if you wanted to open a PR, you're welcome to!