CI with Angular 8

[maxokorokov]

The goal of this PR is to make CI pass with Angular 8 (without ivy)

• Update dependencies: Angular 8.0, Bootstrap 4.3.1, latest CLI deps
• add {static: true/false} for queries
• fix flaky tests → execution order changed with latest dependencies, so some tests were leaving DOM nodes and some tests were using ids like popover-1 depending on test execution order
• fix TS compilation issues

Please see separate commits and don't squash when merging

Fixes #3213

[maxokorokov]

Well, there are definitely some positioning issues when running tests in parallel (exactly 18px on the Y axis, if you see logs).

• I can't reproduce them locally even by running a couple of browsers in parallel
• Might be related to updates in Karma/Jasmine/runners, but not sure

[codecov-io]

Codecov Report

Merging #3220 into master will decrease coverage by 1.89%.
The diff coverage is 95%.

@@            Coverage Diff            @@
##           master    #3220     +/-   ##
=========================================
- Coverage   92.04%   90.14%   -1.9%     
=========================================
  Files          91       91             
  Lines        3054     2700    -354     
  Branches      505      503      -2     
=========================================
- Hits         2811     2434    -377     
- Misses        179      207     +28     
+ Partials       64       59      -5

Flag	Coverage Δ
#e2e	55.03% <80%> (-7.97%)	⬇️
#unit	87.28% <95%> (-2.2%)	⬇️

Impacted Files	Coverage Δ
src/util/autoclose.ts	84% <0%> (ø)	⬆️
src/rating/rating.ts	96.92% <100%> (-0.38%)	⬇️
src/accordion/accordion.ts	98.43% <100%> (-0.3%)	⬇️
src/datepicker/datepicker.ts	97.75% <100%> (-1.25%)	⬇️
src/pagination/pagination.ts	100% <100%> (ø)	⬆️
src/dropdown/dropdown.ts	93.79% <100%> (-0.82%)	⬇️
src/popover/popover.module.ts	50% <0%> (-50%)	⬇️
src/modal/modal.module.ts	50% <0%> (-50%)	⬇️
src/carousel/carousel.module.ts	50% <0%> (-50%)	⬇️
src/collapse/collapse.module.ts	50% <0%> (-50%)	⬇️
... and 79 more

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[benouat]

LGTM! I updated some stuff via the latest 2 commits:

• fallbacking the es5 target for testing in IE (mostly duplicated some configs files for Saucelabs)
• making the build green with positioning tests (needed to add bootstrap styles to karma)