Cache more intermediates in calculation with unitaries

[thangleiter]

No description provided.

[codecov]

Codecov Report

Merging #84 (affb039) into master (e60bf5f) will increase coverage by 0.49%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #84      +/-   ##
==========================================
+ Coverage   97.13%   97.63%   +0.49%     
==========================================
  Files           9        9              
  Lines        2267     2787     +520     
  Branches      516      720     +204     
==========================================
+ Hits         2202     2721     +519     
+ Misses         29       27       -2     
- Partials       36       39       +3     

Impacted Files	Coverage Δ
filter_functions/numeric.py	96.46% <100.00%> (+1.73%)	⬆️
filter_functions/gradient.py	100.00% <0.00%> (ø)
filter_functions/pulse_sequence.py	97.94% <0.00%> (+0.26%)	⬆️

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