add license title

[waldyrious]

It's not strictly required, but it's useful metadata, and part of the recommended license template text (see http://choosealicense.com/licenses/isc/ and https://opensource.org/licenses/isc-license)

[kylef]

@lloyd also package.json declares the license as MIT which isn't what the package is licensed (ISC):

"licenses": {
    "type": "MIT",
    "url": "https://raw.github.com/lloyd/JSONSelect/master/LICENSE"
}

This should become "licenses": "ISC" if updated, because the format of package.json deprecates the old object syntax in favour of SPDX identifiers.