LFPy/LFPykit: LFPykit-0.2rc3

LFPykit-0.2 release candidate 3 This bugfix/feature release incorporates the following changes since the 0.1 release f7b1c1e (HEAD -> master, tag: v0.2rc3, origin/master, origin/HEAD) some fixes to MANIFEST.in da7ab3c (tag: v0.2rc2) fix python-publish action 14bf010 (tag: v0.2rc1) version 0.2rc1 befedb8 package test scripts (#98) a8e45a4 removed test which duplicates test in LFPy@2.2.dev0 (#96) cb12425 added VolumetricCurrentSourceDensity class (#94) a2ab9a1 add python3.9 to travisCI, provide wheels (#91) b8f08d3 use official NEURON from PyPI (#89) e9a22b5 version bump (#87) 63eb35a Fix assert statements (#86