WIP: React test renderer wrapper#1649

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petegleeson wants to merge 6 commits intoenzymejs:masterfrom

petegleeson:react-test-renderer-wrapper

Commits on May 2, 2018

most basic implementation of adapter calling toTree from react-test-renderer
Pete Gleeson
committed

Commits on May 4, 2018

hacks in usage of new adapter in react 16
Pete Gleeson
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hacks in support for custom wrappers
Pete Gleeson
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adds custom wrapper built on react-test-renderer
Pete Gleeson
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adds comment about where ReactTestInstance has come from
Pete Gleeson
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pulls over logic required to make find() work
Pete Gleeson
committed