Change typeof(x) <: y to x isa y

[pepijndevos]

This PR has been automatically generated by a script co-authored by ChatGPT

[codecov]

Codecov Report

Merging #432 (5ad93b8) into master (b01e0c3) will decrease coverage by 0.28%.
The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master     #432      +/-   ##
==========================================
- Coverage   81.80%   81.52%   -0.28%     
==========================================
  Files          11       11              
  Lines        1440     1440              
==========================================
- Hits         1178     1174       -4     
- Misses        262      266       +4     

Files	Coverage Δ
src/common_interface/function_types.jl	94.04% <100.00%> (ø)
src/common_interface/integrator_utils.jl	86.66% <100.00%> (ø)
src/common_interface/integrator_types.jl	71.42% <50.00%> (ø)

... and 2 files with indirect coverage changes

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