Log Message:
py-mpmath: updated to 1.1.0

1.1.0:

Bugs:
* Fixed severe bug in householder() for complex matrices
* Fixed frequently-reported bug where findroot() mysteriously raised
  UnboundLocalError
* Corrected rounding in binary-to-decimal conversion above 500 digits
* Fixed minor loss of accuracy affecting rf(), ff(), binomial(), beta()
* Fixed incorrect computation of the Hurwitz zeta function in some cases
* Fixed accuracy of digamma function near 0
* Fixed RuntimeError in qfac() in Python 3.7 caused by raising
  StopIteration
* Fix to allow NumPy arrays in fdot()

Features and improvements:
* Added more automatic conversions from Fraction, Decimal, NumPy types
* Support creating mpf from a long literal
* Implemented log1p()
* Slight speedup of eig()
* Implement polylog() for general complex s and z by using Hurwitz zeta
  algorithm as a fallback

Library:
* Test more CPython and PyPy versions
* Drop support for Python 2.6 and 3.2
* Use py.test for test code; lots of code cleanup
* Corrections to the documentation