Expose pass-through of snapshotName argument for `matchSnapshot`

[abmai]

This is poorly documented by Jest; but it is available. It allows users to provide custom names for snapshots so the following code

test('it does render', (t) => {
  t.matchSnapshot('snapshot name');
});

Generates this snapshot name

exports[`it does render: snapshot name 1`] = ...

Documented here: https://facebook.github.io/jest/docs/en/expect.html#tomatchsnapshotpropertymatchers-snapshotname

And then the single-argument works because of here: https://github.com/facebook/jest/blob/master/packages/jest-snapshot/src/index.js#L57

[codecov[bot]]

Codecov Report

Merging #126 into master will decrease coverage by 1.29%. The diff coverage is 0%.

@@            Coverage Diff            @@
##           master     #126     +/-   ##
=========================================
- Coverage   88.05%   86.76%   -1.3%     
=========================================
  Files           3        3             
  Lines          67       68      +1     
  Branches        9        9             
=========================================
  Hits           59       59             
- Misses          6        7      +1     
  Partials        2        2

Impacted Files	Coverage Δ
src/index.js	72.41% <0%> (-2.59%)	:arrow_down:

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[KevinGrandon]

!merge