refactor: update angular to support TypeScript 2.4

Detailed updates:
- rxjs@5.0.x
- tsickle@0.24.x
- typescript@2.4.x
- @bazel/typescript@0.10.0
- protractor@5.1.x
- selenium-webdriver@3.0.x

BREAKING CHANGE:
- the Angular compiler now requires TypeScript 2.4.x.

packages/core/src/change_detection/differs/iterable_differs.ts

@@ -63,8 +63,9 @@ export interface IterableChanges<V> {
    *        of the item, after applying the operations up to this point.
    */
   forEachOperation(
-      fn: (record: IterableChangeRecord<V>, previousIndex: number, currentIndex: number) => void):
-      void;
+      fn:
+          (record: IterableChangeRecord<V>, previousIndex: number|null,
+           currentIndex: number|null) => void): void;
 
   /**
    * Iterate over changes in the order of original `Iterable` showing where the original items