chore: add support for optional chaining and coalescing operator

[layershifter]

This PR adds support for Optional chaining and Nullish coalescing operator for Babel. These features are already supported by our TypeScript version.

[DustyTheBot]

	Warnings
⚠️	There are no updates provided to CHANGELOG. Ensure there are no publicly visible changes introduced by this PR.
⚠️	Package (or peer) dependencies changed. Make sure you have approval before merging!

Changed dependencies are detected.

Changed dependencies in packages/react-component-ref/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in packages/react-proptypes/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in packages/docs-components/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in packages/react-bindings/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in packages/react/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in packages/accessibility/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in scripts/package.json

package	before	after
@babel/core	^7.6.4	^7.7.7

Changed dependencies are detected.

Changed dependencies in packages/state/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Changed dependencies are detected.

Changed dependencies in build/package.json

package	before	after
@babel/core	^7.6.4	^7.7.7
@babel/plugin-proposal-class-properties	^7.5.5	^7.7.4
@babel/plugin-syntax-dynamic-import	^7.2.0	^7.7.4
@babel/plugin-transform-runtime	^7.6.2	^7.7.6
@babel/preset-env	^7.6.3	^7.7.6
@babel/preset-react	^7.6.3	^7.7.4
@babel/preset-typescript	^7.6.0	^7.7.7
@babel/register	^7.4.4	^7.7.7
@babel/standalone	^7.3.2	^7.7.7
@babel/plugin-proposal-nullish-coalescing-operator	-	^7.7.4
@babel/plugin-proposal-optional-chaining	-	^7.7.5

Changed dependencies are detected.

Changed dependencies in packages/styles/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Perf comparison

Status	Scenario	Fluent TPI	Fabric TPI	Ratio	Iterations	Ticks
🔧	Avatar.Fluent	0.54	0.39	1.38:1	2000	1074
🔧	Button.Fluent	1.34	0.17	7.88:1	1000	1337
🔧	Checkbox.Fluent	1.4	0.32	4.38:1	1000	1395
🔧	Dialog.Fluent	0.32	0.16	2:1	5000	1585
🔧	Dropdown.Fluent	3.44	0.34	10.12:1	1000	3435
🔧	Icon.Fluent	0.28	0.03	9.33:1	5000	1378
🔧	Image.Fluent	0.09	0.08	1.13:1	5000	473
🔧	Slider.Fluent	1.87	0.31	6.03:1	1000	1871
🔧	Text.Fluent	0.05	0.02	2.5:1	5000	260
🦄	Tooltip.Fluent	0.38	16.82	0.02:1	5000	1887

🔧 Needs work     🎯 On target     🦄 Amazing

Changed dependencies are detected.

Changed dependencies in packages/react-component-event-listener/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

Perf tests with no regressions

Scenario	Current PR Ticks	Baseline Ticks	Ratio
ProviderMergeThemesPerf.default	1305	1051	1.24:1
Icon.Fluent	1378	1196	1.15:1
AvatarMinimalPerf.default	645	592	1.09:1
LayoutMinimalPerf.default	512	471	1.09:1
ToolbarMinimalPerf.default	760	696	1.09:1
TreeMinimalPerf.default	881	818	1.08:1
HeaderSlotsPerf.default	1294	1207	1.07:1
AccordionMinimalPerf.default	196	185	1.06:1
ButtonMinimalPerf.default	1308	1232	1.06:1
Text.Fluent	260	245	1.06:1
FlexMinimalPerf.default	334	317	1.05:1
AlertMinimalPerf.default	546	523	1.04:1
ItemLayoutMinimalPerf.default	1616	1555	1.04:1
DividerMinimalPerf.default	851	830	1.03:1
DropdownMinimalPerf.default	3318	3236	1.03:1
ProviderMinimalPerf.default	577	559	1.03:1
ButtonSlotsPerf.default	1767	1739	1.02:1
ChatDuplicateMessagesPerf.default	522	512	1.02:1
CheckboxMinimalPerf.default	6542	6442	1.02:1
TextAreaMinimalPerf.default	2915	2862	1.02:1
EmbedMinimalPerf.default	5891	5839	1.01:1
IconMinimalPerf.default	1002	997	1.01:1
ImageMinimalPerf.default	474	468	1.01:1
RadioGroupMinimalPerf.default	371	367	1.01:1
Button.Fluent	1337	1327	1.01:1
AttachmentMinimalPerf.default	993	997	1:1
ChatMinimalPerf.default	1660	1659	1:1
DialogMinimalPerf.default	1557	1556	1:1
FormMinimalPerf.default	685	683	1:1
GridMinimalPerf.default	753	751	1:1
InputMinimalPerf.default	938	937	1:1
ListMinimalPerf.default	615	616	1:1
MenuMinimalPerf.default	1763	1764	1:1
Checkbox.Fluent	1395	1399	1:1
CarouselMinimalPerf.default	1767	1779	0.99:1
DropdownManyItemsPerf.default	437	443	0.99:1
LabelMinimalPerf.default	1612	1631	0.99:1
MenuButtonMinimalPerf.default	1379	1387	0.99:1
SegmentMinimalPerf.default	1150	1156	0.99:1
SplitButtonMinimalPerf.default	11022	11127	0.99:1
TextMinimalPerf.default	243	245	0.99:1
PopupMinimalPerf.default	350	357	0.98:1
PortalMinimalPerf.default	241	246	0.98:1
ReactionMinimalPerf.default	2354	2406	0.98:1
StatusMinimalPerf.default	849	867	0.98:1
TooltipMinimalPerf.default	2273	2343	0.97:1
Slider.Fluent	1871	1929	0.97:1
ChatWithPopoverPerf.default	529	552	0.96:1
HierarchicalTreeMinimalPerf.default	744	777	0.96:1
LoaderMinimalPerf.default	2308	2398	0.96:1
SliderMinimalPerf.default	1818	1888	0.96:1
TableMinimalPerf.default	551	574	0.96:1
AttachmentSlotsPerf.default	3182	3367	0.95:1
ListCommonPerf.default	1036	1093	0.95:1
CustomToolbarPrototype.default	3613	3793	0.95:1
Tooltip.Fluent	1887	1984	0.95:1
Dialog.Fluent	1585	1693	0.94:1
Image.Fluent	473	519	0.91:1
HeaderMinimalPerf.default	395	441	0.9:1
VideoMinimalPerf.default	642	740	0.87:1
Avatar.Fluent	1074	1228	0.87:1
BoxMinimalPerf.default	201	234	0.86:1
Dropdown.Fluent	3435	3976	0.86:1
AnimationMinimalPerf.default	417	528	0.79:1
RefMinimalPerf.default	140	185	0.76:1

Changed dependencies are detected.

Changed dependencies in packages/react-component-nesting-registry/package.json

package	before	after
@babel/runtime	^7.1.2	^7.7.6

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[mnajdova]

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