Update typescript version in package.json

[gilnis2]

When doing the tutorial and do the step of the npm start, The script wasn't work.
After updating the package.json file with a newer typescript version the script back to work.

[bj603]

This issue is confirmed. Before applying this change I experienced this by using node version v6.5.0 and npm version 3.10.3:

node_modules/rxjs/Subject.d.ts(16,22): error TS2415: Class 'Subject<T>' incorrectly extends base class 'Observable<T>'.
  Types of property 'lift' are incompatible.
    Type '<T, R>(operator: Operator<T, R>) => Observable<T>' is not assignable to type '<R>(operator: Operator<T, R>) => Observable<R>'.
      Type 'Observable<T>' is not assignable to type 'Observable<R>'.
        Type 'T' is not assignable to type 'R'.

Updating typescript version solved this. Thank you.

One more thing, probably this update also should be made in 'APM - Final'.