Merge branch 'master' into mpole

.editorconfig

.github/workflows/ci.yml

.gitlab-ci.yml

.test-conda-env-py3.yml

README.rst

asv.conf.json

azure-pipelines.yml

setup.py

sumpy/expansion/local.py

sumpy/expansion/multipole.py

sumpy/fmm.py

sumpy/kernel.py

sumpy/p2p.py

sumpy/point_calculus.py

sumpy/qbx.py

sumpy/tools.py

sumpy/version.py

sumpy/visualization.py

test/test_cse.py

test/test_fmm.py