Merge pull request #21 from leftclickben/VersionBump140

Version bump `1.4.0`

Merge pull request #18 from leftclickben/VersionBump131

Version bump `1.3.1`.

Merge pull request #10 from leftclickben/AddNoteAboutVersionBumps

Add note about version bumps to README.md

Add `package-lock.json` to version control.

Version bump `1.1.0`.

Add build status and license indicator to `README.md`.