Update dependency enzyme to v3.7.0

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change	References
enzyme	devDependencies	minor	3.6.0 -> 3.7.0	homepage, source

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Release Notes

airbnb/enzyme

### [`v3.7.0`](https://renovatebot.com/gh/airbnb/enzyme/blob/master/CHANGELOG.md#​370) ##### New Stuff - `mount`: `.state()`/`.setState()`: allow calling on children ([#​1802](https://renovatebot.com/gh/airbnb/enzyme/pull/1802), [@​ljharb](https://renovatebot.com/gh/ljharb)) - `configuration`: add `reset` ([commit](https://renovatebot.com/gh/airbnb/enzyme/commit/d91d95b8da8900c8f4b7090d2256422a82398ca9)) ##### Fixes - `makeOptions`: ensure that config-level `attachTo`/`hydrateIn` are inherited into wrapper options ([#​1836](https://renovatebot.com/gh/airbnb/enzyme/issues/1836), [@​ljharb](https://renovatebot.com/gh/ljharb)) - `shallow`/`Utils`: call into adapter’s `isCustomComponentElement` if present ([#​1832](https://renovatebot.com/gh/airbnb/enzyme/pull/1832), [@​SinHouse](https://renovatebot.com/gh/SinHouse)) - `shallow`/`mount`: throw an explicit error when state is null/undefined ([commit](https://renovatebot.com/gh/airbnb/enzyme/commit/9ea33d7667a93885d6f1d6e12b0c2661d6d47cd1)) - freeze `ROOT_NODES` for child wrappers ([#​1811](https://renovatebot.com/gh/airbnb/enzyme/pull/1811), [@​jgzuke](https://renovatebot.com/gh/jgzuke)) - `shallow`: `.parents`: ensure that one `.find` call does not affect another ([#​1781](https://renovatebot.com/gh/airbnb/enzyme/pull/1781), [@​ljharb](https://renovatebot.com/gh/ljharb)) - `mount`: update after `simulateError` ([#​1812](https://renovatebot.com/gh/airbnb/enzyme/pull/1812), [@​jgzuke](https://renovatebot.com/gh/jgzuke)) ##### Refactors - `mount`/`shallow`: `getElement`: use `this.single` ([commit](https://renovatebot.com/gh/airbnb/enzyme/commit/6b63db3b002a419076c82d34554916400ef392fa))

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[codecov[bot]]

Codecov Report

Merging #44 into master will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #44   +/-   ##
=======================================
  Coverage   88.88%   88.88%           
=======================================
  Files           3        3           
  Lines           9        9           
  Branches        6        6           
=======================================
  Hits            8        8           
  Misses          1        1

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[KevinGrandon]

!merge