Added debounce time to autocomplate (and lookup)

[Blackbaud-SteveBrush]

Addresses: https://github.com/blackbaud/skyux-lookup/issues/7

[blackbaud-conorwright]

Looks good to me

[Blackbaud-AlexKingman]

I notice you aren't using fixture.detectChanges() in the tick(10) scenario, but you do use in in thetick(400) scenario. Does this impact the test? Just trying to make sure we're comparing apples and apples and not getting a false positive.

[Blackbaud-SteveBrush]

Good eye. I didn't put a detectChanges there because there wasn't any data binding taking place. But I threw one in there just in case.

[codecov-io]

Codecov Report

Merging #8 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master     #8   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files          13     13           
  Lines         613    619    +6     
  Branches      107    108    +1     
=====================================
+ Hits          613    619    +6

Impacted Files	Coverage Δ
...blic/modules/lookup/lookup-autocomplete-adapter.ts	100% <100%> (ø)	⬆️
...lic/modules/autocomplete/autocomplete.component.ts	100% <100%> (ø)	⬆️

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[blackbaud-johnly]

Created blackbaud/skyux2#2172 to document the debounceTime input.