feat(tab-bar): Launch tab, tab indicator, tab scroller, tab bar

[patrickrodee]

Release new MDCTab, MDCTabIndicator, MDCTabScroller, and MDCTabBar.

BREAKING CHANGE: mdc-tabs is deprecated and no longer bundled in the material-components-web package. You are encouraged to use the new mdc-tab-bar and related packages instead.

[mdc-web-bot]

All 140 screenshot tests passed for commit d7af258 vs. master! 💯🎉

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@19724f1). Click here to learn what that means.
The diff coverage is 100%.

@@            Coverage Diff            @@
##             master    #3252   +/-   ##
=========================================
  Coverage          ?   98.35%           
=========================================
  Files             ?      120           
  Lines             ?     5118           
  Branches          ?      638           
=========================================
  Hits              ?     5034           
  Misses            ?       84           
  Partials          ?        0

Impacted Files	Coverage Δ
packages/mdc-tab/constants.js	100% <ø> (ø)
packages/mdc-tab-scroller/rtl-default-scroller.js	100% <100%> (ø)
packages/mdc-tab-bar/foundation.js	100% <100%> (ø)
packages/mdc-tab-indicator/sliding-foundation.js	100% <100%> (ø)
packages/mdc-tab-bar/index.js	100% <100%> (ø)
packages/mdc-tab-indicator/foundation.js	100% <100%> (ø)
packages/mdc-tab/index.js	100% <100%> (ø)
packages/mdc-tab/foundation.js	100% <100%> (ø)
packages/mdc-tab-scroller/rtl-negative-scroller.js	100% <100%> (ø)
packages/mdc-tab-scroller/rtl-scroller.js	100% <100%> (ø)
... and 9 more

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[mdc-web-bot]

All 140 screenshot tests passed for commit f37cb41 vs. master! 💯🎉

[kfranqueiro]

This needs a breaking change note in the commit description due to the change to the material-components-web package. e.g.:

BREAKING CHANGE: mdc-tabs is deprecated and no longer bundled in the material-components-web package. You are encouraged to use the new mdc-tab-bar and related packages instead.