Add 'optionalChaining' to babylon-parser

[chrishelgert]

As discussed in #183 this will be the first quick fix with adding optionalChainging to the plugin list.

[chrishelgert]

if i should add an test, it would be great to know if i should add it to an existing spec or create a new one for this 👍

[emilgoldsmith]

I don't think a test is needed for this, it's pretty simple :). I'll just merge it in, thanks for the contribution, it's always appreciated no matter the size :).

[emilgoldsmith]

It seems like we need to fix CI first as addressed in #190, then I'll merge it in right away

[coveralls]

Coverage remained the same at 99.635% when pulling ad7dd7e on chrishelgert:patch-1 into 379177d on styled-components:master.

[mxstbr]

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[rainboxx]

Could we have this in a release, please? 🙂

[emilgoldsmith]

Oh we never released this? Sorry if so, I'll try and remember this weekend, if I forget please feel free to remind me again

[emilgoldsmith]

@rainboxx published as 1.3.2