Increase tolerance for PEL pole reduction test (#377)
Increase tolerance for PEL pole reduction test (#377)

It keeps failing kind of randomly depending on the system. It passes in
the CIs but not on my machine (with the same versions of numpy). So I
increased the tolerance for the misfit to make this go away. We really
need to do something about the tiny values in the Jacobian and Hessian
for some inversions.
victortxa/fatiando,fatiando/fatiando,drandykass/fatiando,victortxa/fatiando,santis19/fatiando,rafaelmds/fatiando,cmeessen/fatiando,fatiando/fatiando,rafaelmds/fatiando,santis19/fatiando,drandykass/fatiando,cmeessen/fatiando