Update tests due to scipy constants change.
energy_to_wavevector changed due to changes in:
- ur("electron_mass")
- ur("hbar") see: https://github.com/scipy/scipy/commit/f166e3a7140d72dbd7cd718fbf65c53ba4a3a961#diff-0680be3eaa6e6ae60d2e2118fc49b13e
Closes #1274 (closed)