DOCUMENTATION:
  name: root
  version_added: "1.9"
  short_description: root of (math operation)
  description:
    - Math operation that returns the Nth root of inputed number C(X ^^ N).
  positional: _input, base
  options:
    _input:
      description: Number to operate on.
      type: float
      required: true
    base:
      description: Which root to take.
      type: float
      default: 2

EXAMPLES: |

  # => 8
  fiveroot: "{{ 32768 | root (5) }}"

  # 2
  sqrt_of_2: "{{ 4 | root }}"

  # me ^^ 3
  cuberoot_me: "{{ me | root(3) }}"

RETURN:
  _value:
    description: Resulting number.
    type: float