OS compatibility, style and code cleanup.

This release addresses OS compatibility (for Mac), style and code cleanup.

This version is now available in pip and npm.

Many thanks to lcn2 from the IOCCC for their contribution. And a big thank you to all past contributors.

What's Changed

• use grep -E, add Makefile, add -S, -A, -T options, fix ensure_deps.sh for macOS, fix command line parsing, make JSONPath.sh and test scripts robust by @lcn2 in #16

New Contributors

• @lcn2 made their first contribution in #16

Full Changelog: v0.0.18...v0.0.19