Fix deprecations

[sethaxen]

Fixes #68

[codecov-commenter]

Codecov Report

Merging #69 (aebf3d5) into master (2545498) will not change coverage.
The diff coverage is 75.00%.

@@           Coverage Diff           @@
##           master      #69   +/-   ##
=======================================
  Coverage   57.20%   57.20%           
=======================================
  Files          18       18           
  Lines        2748     2748           
  Branches      539      539           
=======================================
  Hits         1572     1572           
  Misses       1060     1060           
  Partials      116      116           

Impacted Files	Coverage Δ
e3fp/fingerprint/metrics/fprint_metrics.py	72.50% <ø> (ø)
e3fp/config/params.py	41.09% <33.33%> (ø)
e3fp/fingerprint/structs.py	71.42% <50.00%> (ø)
e3fp/conformer/generator.py	62.98% <75.00%> (ø)
e3fp/fingerprint/array_ops.py	75.92% <75.00%> (ø)
e3fp/fingerprint/fprint.py	54.78% <75.00%> (ø)
e3fp/fingerprint/fprinter.py	86.30% <100.00%> (ø)
e3fp/fingerprint/metrics/array_metrics.py	87.91% <100.00%> (ø)

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