Bump kiwisolver from 1.2.0 to 1.3.1

Bumps kiwisolver from 1.2.0 to 1.3.1.

Changelog

Sourced from kiwisolver's changelog.

Wrappers 1.3.1 | Solver 1.3.1 | 11/01/2020

• allow to avoid linking against VC2014_1 on windows PR #97
• do not mark move constructor / assignment operator of expression as noexcept PR #97 This is to circumvent a suspected bug in the GCC compiler in the manylinux1 image.

Wrappers 1.3.0 | Solver 1.3.0 | 10/21/2020

• add c++ benchmarks and run them on CIs PR #91
• modernize the c++ code by using more c++11 features PR #90
• introduce move semantic in some c++ constructors to improve performances PR #89
• add support for Python 3.9 PR #88

Commits

• 7c4e976 cut release 1.3.1
• 3ae4b5e Merge pull request #96 from srinivas32/master
• 2101b0a travis: don't build 3.9 on ARM64
• 23886d3 travis: fix typo
• d180894 Update PPC64le jobs name and add Python 3.9
• d40446f Merge pull request #97 from nucleic/windows-build
• 70647bf cpp: add more detail about the noexcept removal
• e78fd4a update releasenotes
• 9491cc2 cpp: do not mark move constructor / assignment operator of expression as noex...
• 4d08c9c setup.py: fix missing import
• Additional commits viewable in compare view