Fix reset_memo_wise support for private methods

[ms-ati]

Fixes #110

[codecov]

Codecov Report

Merging #111 (6a6ed81) into main (f094adc) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main      #111   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            2         2           
  Lines          621       626    +5     
=========================================
+ Hits           621       626    +5     

Impacted Files	Coverage Δ
lib/memo_wise.rb	100.00% <100.00%> (ø)
spec/memo_wise_spec.rb	100.00% <100.00%> (ø)

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[JacobEvelyn]

LGTM as long as that test failed beforehand.