The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
Which renders the NPM package as unlicensed as it is packaged to NPM public repository without a LICENSE file and thus without the copyright and permission notice thus voiding the license.
Coverage remained the same at 99.16% when pulling 5cc37ddc4385dd7a740e38e7c2fa6a5e298c8898 on kylef/license into df5c33168640a96f026193db905782179c8e5c90 on master.
The MIT license states the following:
Which renders the NPM package as unlicensed as it is packaged to NPM public repository without a LICENSE file and thus without the copyright and permission notice thus voiding the license.