Change deprecated 'licenses' property to 'license', drop Apache License 2.0 url
Change deprecated 'licenses' property to 'license', drop Apache License 2.0 url

'npm install' warns about no license field available in package.json.
polo14va/HAP-NodeJS,mrhornsby/HAP-NodeJS,pascalmartin/HAP-NodeJS,matthiaslau/HAP-NodeJS,KhaosT/HAP-NodeJS,peterlee0127/HAP-YeeLight,KhaosT/HAP-NodeJS