remove a bunch of 'any' types

[dynst]

Description:

Replace a bunch of any types with either unknown or a more specific type.

But two are harder to replace, changing them causes type errors:

rxjs/packages/observable/src/observable.ts

Line 262 in c15b37f

constructor(destination: Subscriber<any> | Partial<Observer<any>> | ((value: any) => void) | null, overrides: SubscriberOverrides<T>);

rxjs/packages/observable/src/observable.ts

Line 498 in c15b37f

function handleStoppedNotification(notification: ObservableNotification<any>, subscriber: Subscriber<any>) {

  Type 'Subscriber<T>' is not assignable to type 'Subscriber<unknown>'.
    Type 'unknown' is not assignable to type 'T'.

BREAKING CHANGE:

Related issue (if exists):

Part of the 8.x roadmap in #6367

Replace all external uses of any with unknown. (This could likely be non-breaking, FWIW.)