Tests fail with --precompiled-modules=no

Various tests are broken when using julia --compiled-modules=no, due to the definition order of functions and methods relative to generated functions which causes world age errors. This is currently a problem for people calling julia from python.

Possibly useful to xref the analogous issue in Unitful: https://github.com/PainterQubits/Unitful.jl/issues/232