Method overwriting in `main`

[AFeuerpfeil]

Currently, when precompiling MPSKit.jl on the main branch, one gets a precompilation error due to method overwriting with TensorOperations.jl. I don't know whether this was accidental or necessary to push the refactor of the AC(2)_hamiltonian's through:

WARNING: Method definition allocation_size(Type{T}, Int64) where {T} in module TensorOperations at /home/afeuerpfeil/.julia/packages/TensorOperations/W0zHH/src/implementation/allocator.jl:261 overwritten in module MPSKit at /home/afeuerpfeil/.julia/packages/MPSKit/AUDQL/src/utility/utility.jl:354.
ERROR: Method overwriting is not permitted during Module precompilation. Use `__precompile__(false)` to opt-out of precompilation.

[lkdvos]

Thanks for reporting, should be fixed now!