Fix ODEFunction constructor

[codecov[bot]]

Codecov Report

Merging #483 (8d7de64) into master (a6b09ce) will decrease coverage by 1.52%. The diff coverage is 17.64%.

@@            Coverage Diff             @@
##           master     #483      +/-   ##
==========================================
- Coverage   57.28%   55.76%   -1.52%     
==========================================
  Files          50       50              
  Lines        3657     3658       +1     
==========================================
- Hits         2095     2040      -55     
- Misses       1562     1618      +56     

Files Changed	Coverage Δ
src/ensemble/basic_ensemble_solve.jl	80.18% <ø> (ø)
src/ensemble/ensemble_solutions.jl	44.95% <0.00%> (ø)
src/scimlfunctions.jl	57.89% <ø> (-1.90%)	:arrow_down:
src/ensemble/ensemble_problems.jl	40.90% <10.00%> (-1.95%)	:arrow_down:
ext/ZygoteExt.jl	50.00% <40.00%> (ø)

... and 9 files with indirect coverage changes

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[ChrisRackauckas]

How did this come up? AutoSpecialize is almost always going to be preferred to NoSpecialize

[YingboMa]

JuliaSimCompiler switches to NoSpecialize when the IR is sufficiently big.

[ChrisRackauckas]

Does that actually make a difference?

[YingboMa]

It helped compare to FullSpecialize, but I didn't compare it to AutoSpecialize.