Add iscomplex type param to PDESolutions

[xtalax]

No description provided.

[ChrisRackauckas]

What is this? And won't other constructors need to be updated for this?

[codecov]

Codecov Report

Merging #361 (71487a2) into master (0235a49) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #361      +/-   ##
==========================================
- Coverage   57.46%   57.45%   -0.01%     
==========================================
  Files          43       43              
  Lines        3289     3291       +2     
==========================================
+ Hits         1890     1891       +1     
- Misses       1399     1400       +1     

Impacted Files	Coverage Δ
src/solutions/pde_solutions.jl	0.00% <0.00%> (ø)
src/retcodes.jl	31.57% <0.00%> (-3.51%)	⬇️
src/integrator_interface.jl	45.51% <0.00%> (-1.67%)	⬇️
src/interpolation.jl	32.95% <0.00%> (-0.39%)	⬇️
src/solutions/solution_interface.jl	59.25% <0.00%> (ø)
src/ensemble/ensemble_analysis.jl	79.50% <0.00%> (+0.81%)	⬆️
src/ensemble/basic_ensemble_solve.jl	81.73% <0.00%> (+0.96%)	⬆️
src/solutions/ode_solutions.jl	93.93% <0.00%> (+2.02%)	⬆️
src/operators/common_defaults.jl	67.64% <0.00%> (+2.94%)	⬆️
src/tabletraits.jl	73.33% <0.00%> (+10.00%)	⬆️

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[xtalax]

Just something to dispatch on for when the solution is complex, though on second thought I could do this with the metadata.

Is anyone else using these yet?