mpmath 1.3.0

[Fredrik Johansson]

Hi all,

mpmath 1.3.0 is available on GitHub (https://github.com/mpmath/mpmath) and PyPi (https://pypi.org/project/mpmath/).

Thanks to everyone who contributed to this release! The changelog follows:

Security issues:

* Fixed ReDOS vulnerability in mpmathify() (CVE-2021-29063) (Vinzent Steinberg)

Features:

* Added quadsubdiv() for numerical integration with adaptive path splitting
  (Fredrik Johansson)
* Added the Cohen algorithm for inverse Laplace transforms
  (Guillermo Navas-Palencia)
* Some speedup of matrix multiplication (Fredrik Johansson)
* Optimizations to Carlson elliptic integrals (Paul Masson)
* Added signal functions (squarew(), trianglew(), sawtoothw(), unit_triangle()
  sigmoidw()) (Nike Dattani, Deyan Mihaylov, Tina Yu)

Bug fixes:

* Correct mpf initialization from tuple for finf and fninf (Sergey B Kirpichev)
* Support QR decomposition for matrices of width 0 and 1 (Clemens Hofreither)
* Fixed some cases where elliprj() gave inaccurate results (Fredrik Johansson)
* Fixed cases where digamma() hangs for complex input (Fredrik Johansson)
* Fixed cases of polylog() with integer-valued parameter with complex type
  (Fredrik Johansson)
* Fixed fp.nsum() with Euler-Maclaurin algorithm (Fredrik Johansson)

Maintenance:

* Dropped support for Python 3.4 (Sergey B Kirpichev)
* Documentation cleanup (Sergey B Kirpichev)
* Removed obsolete files (Sergey B Kirpichev)
* Added options to runtests.py to skip tests and exit on failure
  (Jonathan Warner)

Let me know if there are any issues that need to be patched urgently.

Best,

Fredrik