Update cra-kitchen-sink versioning for alpha release

[shilman]

Issue: N/A

What I did

-alpha naming scheme is not semver, so Lerna does not do the right
thing here, and as a workaround we need to hardcode the version numbers
while we’re doing alpha releases if we want our example apps to work
properly.

How to test

yarn bootstrap
cd examples/cra-kitchen-sink
yarn storybook

Before this PR, you will get an error because it is using the public NPM version of addon-notes.

After this PR, you'll be using the repo version of addon-notes, and the example should work.

[storybookbot]

	Fails
🚫	PR is not labeled with one of: ["cleanup","breaking","feature","bug","documentation","maintenance","greenkeeper","other"]

Generated by 🚫 dangerJS

[codecov]

Codecov Report

Merging #1400 into release/3.2 will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           release/3.2    #1400   +/-   ##
============================================
  Coverage        15.82%   15.82%           
============================================
  Files              237      237           
  Lines             5043     5043           
  Branches           726      695   -31     
============================================
  Hits               798      798           
- Misses            3648     3669   +21     
+ Partials           597      576   -21

Impacted Files	Coverage Δ
addons/info/src/components/Props.js	0% <0%> (ø)	⬆️
app/react/src/client/preview/error_display.js	0% <0%> (ø)	⬆️
addons/events/src/components/Event.js	0% <0%> (ø)	⬆️
lib/ui/src/modules/ui/configs/handle_routing.js	28.94% <0%> (ø)	⬆️
.../ui/src/modules/ui/components/layout/dimensions.js	15.62% <0%> (ø)	⬆️
addons/notes/src/react.js	0% <0%> (ø)	⬆️

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