@ionic/app-scripts/dist/tsc.js: localforage cannot find name 'Promise'


#1
[03:42:30]  typescript compiler failed:  node_modules/@types/localforage/index.d.ts(25,25): error TS2304: Cannot find name 'Promise'.

[03:42:30]  Error: node_modules/@types/localforage/index.d.ts(25,25): error TS2304: Cannot find name 'Promise'.

    at Socket.<anonymous> (/Users/myuser/devel/myapp/node_modules/@ionic/app-scripts/dist/tsc.js:72:33)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at readableAddChunk (_stream_readable.js:172:18)
    at Socket.Readable.push (_stream_readable.js:130:10)
    at Pipe.onread (net.js:542:20)

My last error after upgarde from Beta11 to RC0, please help!

UPDATE

Any type definitions for third party libraries that are included via the typings tool and are included in the the typings.json file should be updated to use npm @types. Delete the typings.json file, and the typings directory.

WOW?! REALLY, SURE?? We have many of own definitions in that directory? There is no NPM package for own declared vars last time I checked.