Request missing tokens for owned packages and include free promotions

[Revadike]

Continuation of #352

Resolves #351

[Revadike]

@DoctorMcKay Thanks again for merging this PR. Some closing remarks:

• Anonymous session hasn't really been tested, I think.
• The documentation still has to be updated:
  • getOwnedX and ownsX now uses filter as parameter (but still supports old syntax and behavior (<= v4.22.0))
  • getOwnedLicenses has been added (can be called after licenses event), separating the definitions of owned packages and owned licenses. Licenses are all the packages tied to the account. Owned packages are licenses without expired (and shared & temporary) licenses.
  • Methods relating to package ownership now can no longer be safely called until appOwnershipCached is emitted when a (default) filter is supplied, else it reverts to old behavior (returns all owned licenses ids). More info
• appOwnershipCached should perhaps be renamed to plainly ownershipCached as it is needed for packages too now
• I can't think of situations where don't you want to request missing tokens for getProductInfo, so maybe it should request missing tokens by default (set inclTokens by default to true), unless explicitly disallowed.
• As I mentioned earlier in our discord conversation, this seems to happen on occasion, but I'm not sure why. It should be investigated.

[Revadike]

I just happened to test anonymous ownershipcache and I get an error:

\node_modules\steam-user\components\apps.js:564
                let packageids = this.licenses.map(license => license.package_id);
                                               ^

TypeError: Cannot read properties of null (reading 'map')
    at SteamUser._getLicenseInfo (\node_modules\steam-user\components\apps.js:564:34)
    at SteamUser.<anonymous> (\node_modules\steam-user\components\08-logon.js:538:10)
    at \node_modules\steam-user\components\classes\HandlerManager.js:35:12
    at Array.forEach (<anonymous>)
    at HandlerManager.emit (\node_modules\steam-user\components\classes\HandlerManager.js:34:12)
    at SteamUser._handleMessage (\node_modules\steam-user\components\03-messages.js:635:25)
    at SteamUser._handleNetMessage (\node_modules\steam-user\components\03-messages.js:556:8)
    at SteamUser._processMulti (\node_modules\steam-user\components\03-messages.js:687:9)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)

[DoctorMcKay]

I just happened to test anonymous ownershipcache and I get an error:

79388be