Breaking Changes in v7.0

ParameterizedFunctions.jl, along with a few other modeling libraries, are no longer exported by DifferentialEquations.jl. You must do using ParameterizedFunctions to use the `@ode_def macro. As it has not been part of the documentation for 3 years, this is breaking but should not effect most users. This reduces the dependencies and using time of the library by about half.
OrdinaryDiffEq.jl has a new linear solver system based on the LinearSolve.jl library. linsolve arguments now take LinearSolve.jl solvers.

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