Fix multiplying Symmetric and Hermitian matrices

[odow]

Closes #260

[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (48569d2) 90.86% compared to head (74da2c7) 90.95%.
Report is 1 commits behind head on master.

Files	Patch %	Lines
src/dispatch.jl	72.72%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #261      +/-   ##
==========================================
+ Coverage   90.86%   90.95%   +0.08%     
==========================================
  Files          23       23              
  Lines        2157     2167      +10     
==========================================
+ Hits         1960     1971      +11     
+ Misses        197      196       -1     

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