fix(fab): Made initRipple and unbounded props optional

[Maxim-Mazurok]

This PR is a follow up to this conversation: b62c36f#r33164756

initRipple and unbounded props should be optional.

[moog16]

@Maxim-Mazurok it looks like tests are failing. Could you please provide a fix for those? Thanks!

[Maxim-Mazurok]

I thought that tests failed because the previous build also failed. I will run tests locally later to figure out what happened.

[moog16]

https://travis-ci.com/material-components/material-components-web-react/jobs/193054458

It looks like you're getting TS FabProp errors.

Sounds good - thanks!

[moog16]

fixes #841

[Maxim-Mazurok]

Sorry for leaving this PR without updates for a while.
I took a look and it seems that this change is not as easy as I thought originally, it breaks a lot of stuff. Needs further investigation, so I'll try to find time for it in the next couple of days.

[moog16]

@Maxim-Mazurok no worries - thanks for making the changes. LMK if you need anything.

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[codecov-io]

Codecov Report

Merging #810 into rc0.12.0 will not change coverage.
The diff coverage is 92.18%.

@@            Coverage Diff            @@
##           rc0.12.0     #810   +/-   ##
=========================================
  Coverage     94.47%   94.47%           
=========================================
  Files            81       81           
  Lines          3475     3475           
  Branches        532      532           
=========================================
  Hits           3283     3283           
  Misses           66       66           
  Partials        126      126

Impacted Files	Coverage Δ
packages/checkbox/NativeControl.tsx	100% <100%> (ø)	⬆️
packages/drawer/AppContent.tsx	66.66% <100%> (ø)	⬆️
packages/select/Option.tsx	100% <100%> (ø)	⬆️
packages/tab/TabRipple.tsx	100% <100%> (ø)	⬆️
packages/chips/ChipCheckmark.tsx	80% <100%> (ø)	⬆️
packages/dialog/DialogTitle.tsx	100% <100%> (ø)	⬆️
packages/menu/MenuList.tsx	100% <100%> (ø)	⬆️
packages/card/ActionButtons.tsx	92.3% <100%> (ø)	⬆️
packages/icon-button/index.tsx	97.91% <100%> (ø)	⬆️
packages/dialog/index.tsx	97.9% <100%> (ø)	⬆️
... and 94 more

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[moog16]

@Maxim-Mazurok there are a few conflicts occurring now. Please update when you get a chance. Thanks!