TST create sparse and dataframe tags for X_types

[glemaitre]

closes #650

Add tags "sparse" and "dataframe" as two tags that could be added to X_types.

[codecov]

Codecov Report

Merging #803 (aae1cac) into master (6155658) will decrease coverage by 0.83%.
The diff coverage is 66.66%.

@@            Coverage Diff             @@
##           master     #803      +/-   ##
==========================================
- Coverage   98.62%   97.78%   -0.84%     
==========================================
  Files          89       87       -2     
  Lines        5881     5783      -98     
  Branches      494      496       +2     
==========================================
- Hits         5800     5655     -145     
+ Misses         80       71       -9     
- Partials        1       57      +56     

Impacted Files	Coverage Δ
imblearn/over_sampling/_random_over_sampler.py	100.00% <ø> (ø)
...ling/_prototype_selection/_random_under_sampler.py	100.00% <ø> (ø)
imblearn/utils/estimator_checks.py	93.80% <66.66%> (-2.16%)	⬇️
imblearn/utils/deprecation.py	80.00% <0.00%> (-20.00%)	⬇️
imblearn/datasets/_imbalance.py	76.47% <0.00%> (-11.77%)	⬇️
imblearn/ensemble/_weight_boosting.py	92.13% <0.00%> (-5.62%)	⬇️
imblearn/ensemble/_forest.py	92.10% <0.00%> (-5.27%)	⬇️
imblearn/metrics/_classification.py	91.32% <0.00%> (-5.03%)	⬇️
imblearn/datasets/_zenodo.py	91.93% <0.00%> (-4.84%)	⬇️
imblearn/pipeline.py	95.65% <0.00%> (-3.27%)	⬇️
... and 9 more

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