feat(icon-button): Convert to TypeScript

[abhiomkar]

Refs #4225

[moog16]

Don't forget to also update js-bundle-factory.js to

iconButton: getAbsolutePath('/packages/mdc-icon-button/index.ts'),

[kfranqueiro]

Do we also need to update index to index.ts for icon-button in material-components-web/index.js? It looks like we've been doing that for the others as they've been converted.

[moog16]

@kfranquiero I think we may have missed a few component declarations in material-components-web/index.js. We can do it here to be consistent, but we will eventually remove all the .ts exts anyways during the clean up phase of #4225.

[kfranqueiro]

@moog16 afaict we have done it for every package that's been hit so far, with the exception of animation which doesn't appear in material-components-web/index.js at all. I was assuming it was necessary for the all-in-one build to work?

[moog16]

Don't think it is necessary since webpack resolves either .js or .ts.

I would test...but waiting for npm i to finish. :|

[moog16]

ensure that the all-in-one package compiles without adding the .ts extensions

[codecov-io]

Codecov Report

Merging #4325 into feat/typescript will increase coverage by <.01%.
The diff coverage is 100%.

@@                 Coverage Diff                 @@
##           feat/typescript    #4325      +/-   ##
===================================================
+ Coverage            98.39%   98.39%   +<.01%     
===================================================
  Files                   93       93              
  Lines                 5793     5803      +10     
  Branches               782      784       +2     
===================================================
+ Hits                  5700     5710      +10     
  Misses                  92       92              
  Partials                 1        1

Impacted Files	Coverage Δ
packages/mdc-icon-button/index.ts	100% <100%> (ø)
packages/mdc-icon-button/foundation.ts	100% <100%> (ø)

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[mdc-web-bot]

All 621 screenshot tests passed for commit 3f76537 vs. feat/typescript! 💯🎉

[mdc-web-bot]

All 621 screenshot tests passed for commit b7aed18 vs. feat/typescript! 💯🎉

[mdc-web-bot]

All 621 screenshot tests passed for commit 213088c vs. feat/typescript! 💯🎉

[mdc-web-bot]

All 621 screenshot tests passed for commit 8f022e3 vs. feat/typescript! 💯🎉

[mdc-web-bot]

All 621 screenshot tests passed for commit 8c460ec vs. feat/typescript! 💯🎉

[mdc-web-bot]

All 621 screenshot tests passed for commit dd61d5a vs. feat/typescript! 💯🎉

[acdvorak]

LGTM!

[mdc-web-bot]

All 621 screenshot tests passed for commit fe14419 vs. feat/typescript! 💯🎉