Add support for Lazy, Memo and Suspense, bump deps

[xkxd]

We needed that, so I decided to implement missing stuff from React 16.6 (at least until Enzyme will not support it in easier/different way)

Added:

• React.lazy => resolves to <React.Lazy>
• React.memo => resolves to <React.Memo>
• React.Suspense=> resolves to <React.Suspense>

Removed/Changed (because of enzyme's update):

• React.Fragment resolves to <Fragment> + child fragments are not visible in snapshots
• Array => renders differently

[codecov]

Codecov Report

Merging #120 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #120   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files           6      6           
  Lines         102    104    +2     
  Branches       39     40    +1     
=====================================
+ Hits          102    104    +2

Impacted Files	Coverage Δ
src/shallow.js	100% <ø> (ø)	⬆️
src/utils.js	100% <100%> (ø)	⬆️

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[adriantoine]

Hi @xkxd! Thank you very much for your PR, it looks good to me. I'll make a new release today.