added adaptive active learning multilabel query strategy

[yangarbiter]

No description provided.

[codecov-io]

Codecov Report

Merging #91 into master will increase coverage by 1.2%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master      #91     +/-   ##
=========================================
+ Coverage    77.7%   78.91%   +1.2%     
=========================================
  Files          31       32      +1     
  Lines        1081     1143     +62     
=========================================
+ Hits          840      902     +62     
  Misses        241      241

Impacted Files	Coverage Δ
libact/query_strategies/multilabel/init.py	100% <100%> (ø)	✅
..._strategies/multilabel/adaptive_active_learning.py	100% <100%> (ø)
libact/models/multilabel/binary_relevance.py	78.08% <100%> (+1.27%)	✅

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