Core & UI: upgrade events from 1.1.1 to 2.0.0

[Hypnosphi]

Fixes #2906

Changelog

We don't use EventEmitter#listeners anywhere, so we're safe to upgrade

[codecov]

Codecov Report

Merging #3075 into master will decrease coverage by 0.48%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##           master   #3075      +/-   ##
=========================================
- Coverage   36.08%   35.6%   -0.49%     
=========================================
  Files         438     420      -18     
  Lines        9447    9889     +442     
  Branches      880     808      -72     
=========================================
+ Hits         3409    3521     +112     
- Misses       5489    5919     +430     
+ Partials      549     449     -100

Impacted Files	Coverage Δ
addons/knobs/src/angular/utils.js	74.19% <0%> (-7.95%)	⬇️
addons/knobs/src/angular/helpers.js	72.78% <0%> (-4.19%)	⬇️
lib/core/src/client/preview/syncUrlWithStore.js	39.13% <0%> (-1.78%)	⬇️
lib/core/src/client/preview/config_api.js	45.76% <0%> (-0.79%)	⬇️
addons/notes/src/register.js	0% <0%> (ø)	⬆️
addons/a11y/src/components/Report/Tags.js	0% <0%> (ø)	⬆️
lib/core/src/client/manager/preview.js	0% <0%> (ø)	⬆️
lib/cli/lib/has_yarn.js	0% <0%> (ø)	⬆️
.../core/src/server/config/defaults/webpack.config.js	0% <0%> (ø)	⬆️
app/vue/src/server/config/webpack.config.prod.js	0% <0%> (ø)	⬆️
... and 208 more

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