not only on licenses of repository as a whole (i.e., "MIT") but
individual component files; see `filesByLicense` in `licenseInfo.json`
for a map of license to these files within the repo with their own
licenses. See the new license badges on the README for a summary of
the licenses including either bundled devDependencies or all
`devDependencies` (we have no direct npm `dependencies` currently).
- Docs: Add license badges and `licenseInfo.json` (has a
`filesByLicense` map of files to licenses (not yet used programmatically)
and `bundledRootPackages` which is used by `license-badger` to know which
dev. packages are being bundled (added by `npm run copy`) for determining
summary of all licenses including bundled).
- npm: Update devDep.