fix MPPDEConv

[YichengDWu]

No description provided.

[codecov]

Codecov Report

Merging #34 (5eb3694) into main (6e08a35) will increase coverage by 0.12%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #34      +/-   ##
==========================================
+ Coverage   84.74%   84.87%   +0.12%     
==========================================
  Files           2        2              
  Lines         118      119       +1     
==========================================
+ Hits          100      101       +1     
  Misses         18       18              

Impacted Files	Coverage Δ
src/layers.jl	84.11% <100.00%> (+0.14%)	⬆️

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