Update Sklearn DFS Transformer

[kmax12]

This PR updates the test case for the sklearn DFS transformer to no check for the number of output features. it also updates the default values

[codecov]

Codecov Report

Merging #343 into master will decrease coverage by <.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #343      +/-   ##
==========================================
- Coverage   95.35%   95.35%   -0.01%     
==========================================
  Files          74       74              
  Lines        7792     7791       -1     
==========================================
- Hits         7430     7429       -1     
  Misses        362      362

Impacted Files	Coverage Δ
featuretools/wrappers/sklearn.py	95.65% <ø> (ø)	⬆️
...eaturetools/tests/wrappers/test_sklearn_wrapper.py	100% <ø> (ø)	⬆️

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