Concrete numpy.number subtypes #136

Create concrete subtypes for the following number types

• signedinteger - 💥 concrete signedinteger scalar types #407
  • int8
  • int16
  • int32
  • int64
• unsignedinteger - 💥 concrete unsignedinteger scalar types #408
  • uint8
  • uint16
  • uint32
  • uint64
• floating - 💥 concrete floating scalar types #397
  • float16
  • float32
  • float64
  • longdouble
  • float96 = float128 = longdouble
• complexfloating - 💥 concrete complex scalar types #391
  • complex64
  • complex128
  • clongdouble
  • complex192 = complex256 = clongdouble