'aps': The test problems in the 1995 paper
     TOMS "Algorithm 748: Enclosing Zeros of Continuous Functions"
     by Alefeld, Potra and Shi. Real-valued functions of
     real-valued inputs on an interval with a zero.
     Suitable for methods which start with an enclosing interval, and
     derivatives up to 2nd order.

  'complex': Some complex-valued functions of complex-valued inputs.
     No enclosing bracket is provided.
     Suitable for methods which use one or more starting values, and
     derivatives up to 2nd order.

  The test cases are provided as a list of dictionaries. The dictionary
  keys will be a subset of:
  ["f", "fprime", "fprime2", "args", "bracket", "smoothness",
  "a", "b", "x0", "x1", "root", "ID"]
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