fix python 3.10 compilation

[Thomas-Ulrich]

• allow compiling with python 3.10.
• fix cython error:

      Error compiling Cython file:
      ------------------------------------------------------------
      ...
                      min_p2 = p2[bttm - 1]
                  p = findp0(distance, min_p2**0.5,
                             topp, bttm, ray_len, p2)
                  if min_p2 > p2[bttm]:
                      min_p2 = p2[bttm]
                  if p > min_p2**0.5:
                       ^
      ------------------------------------------------------------
      
      pyfk/taup/taup.pyx:60:17: complex types are unordered

• add channel info when generating obspy traces with calculate_sync