Rename data.sourcePath to data.path
2.0.0
Add option to show usage help
Check arguments and print helpful error message
Add another example
Reorganize tests, use tape

Move test data to sub directory
2.0.1
Search current directory if entry point not given

Use `require.resolve` semantics. Also resolve directories given as entry
points.
Update command line usage help
Improve source documentation
Improve documentation
2.1.0