feat(typeahead): add dropup option

[IlyaSurmay]

closes #2281

[codecov]

Codecov Report

Merging #2390 into development will increase coverage by 10.92%.
The diff coverage is 50%.

@@               Coverage Diff                @@
##           development    #2390       +/-   ##
================================================
+ Coverage        75.92%   86.84%   +10.92%     
================================================
  Files              121       96       -25     
  Lines             3614     2730      -884     
  Branches           475      367      -108     
================================================
- Hits              2744     2371      -373     
+ Misses             745      233      -512     
- Partials           125      126        +1

Impacted Files	Coverage Δ
src/typeahead/typeahead-container.component.ts	73.61% <ø> (ø)	⬆️
src/typeahead/typeahead.directive.ts	77.77% <50%> (-0.32%)	⬇️
src/collapse/collapse.module.ts	85.71% <0%> (-14.29%)	⬇️
src/buttons/buttons.module.ts	87.5% <0%> (-12.5%)	⬇️
src/datepicker/daypicker.component.ts
src/datepicker/datepicker.module.ts
src/modal/modal-container.component.ts
src/accordion/index.ts
src/rating/index.ts
src/modal/index.ts
... and 19 more

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[YevheniiaMazur]

Tested, looks good