message: Fix review feedback
  Also found a bug in intertia options (used type without boolean)
diff: @@ -101,7 +101,7 @@ declare namespace interact {
  hold?: number
  snap?: SnapOptions
  restrict?: RestrictOption
  - inertia?: InertiaOption
  + inertia?: InertiaOptions
  autoScroll?: AutoScrollOptions
  onstart?: Listener
  onmove?: Listener
  @@ -174,11 +174,15 @@ declare namespace interact {
  ondrop?: Listener
  }
  + interface OriginFunction {
  + ( target: DOMElement ) : 'self' | 'parent' | Rect | Position | CSSSelector | DOMElement;
  + }
  +
  interface PointerEventsOptions {
  holdDuration?: number
  allowFrom?: string
  ignoreFrom?: string
  - origin?: 'self' | any // TODO: What are the options here, beyond 'self'?
  + origin?: 'self' | 'parent' | Rect | Position | CSSSelector | DOMElement | OriginFunction;
  }
  interface RectChecker {
  @@ -299,7 +303,7 @@ declare namespace interact {
  interface Interactable {
  actionChecker ( checker: ActionChecker) : Interactable
  - context () : Node // TODO: Correct or should it be DOMElement (any)?
  + context () : Node;
  deltaSource () : string | object
  deltaSource ( newValue : string | object): Interactable
  fire ( iEvent : InteractEvent) : Interactable
  @@ -326,7 +330,7 @@ declare namespace interact {
  set ( options: any ) : Interactable
  styleCursor ( yesno: boolean ) : Interactable
  test ( x : SnapFunction ) : any
  - unset(): void // TODO: JSDoc and code doesn't seem to agree here?
  + unset(): void
  }
  interface InteractOptions {
  @@ -339,7 +343,6 @@ declare namespace interact {
  interface InteractStatic {
  ( el: DOMElement | CSSSelector, opts?: InteractOptions | any): Interactable
  - debug (): any
  maxInteractions () : number
  maxInteractions ( newValue: number) : InteractStatic
  off ( opt: OnEvent | OnEventFunctions, listener?: Listener ) : InteractStatic
  @@ -351,9 +354,8 @@ declare namespace interact {
  pointerMoveTolerance ( tol: number ) : InteractStatic
  createSnapGrid ( grid: { x: number, y: number, range: number, offset?: Position, limits?: Rect } ) : SnapFunction
  isSet ( element: DOMElement | CSSSelector ) : boolean
  - debug () : any // TODO: Add typings for scope. But should this really be part of the public API?
  - addDocument ( document: any, options: any ) : void // TODO: Not sure about types. Is Document a DOM Document?
  - removeDocument ( document: any, options: any ) : void // TODO: Not sure about types. Is Document a DOM Document?
  + addDocument ( document: Document, options: any ) : void
  + removeDocument ( document: Document, options: any ) : void
  use ( plugin: Plugin) : InteractStatic;
  }
  }
  