v1.10.1

[c9cba89] only trigger one initial scroll event. This also corrects how isScrollingRight and isScrollingDown are calculated, they are now only true in case an event that changed the regading direction was triggered (before e.g. isScrollingRight was always true in case isScrollingLeft was false which does not need to be correct)
[5ef35d0] always provide full viewport object for ObserveViewport, even if an update is disabled. This is especially important as version 1.9.3 where an initialize even can be fired even if all updates are disabled.

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