Upgrade pip

Bump pySankeyBeta to 1.4.1

Upgrade the version number to test the release

Fix python 3.7 build by upgrading numpy

Add python 3.8 to the package metadata

Upgrade version

Handle all requirements with setup.py

Fix - Syntax error in test case following RightLabel change

Fix - Badge need to link to the master branch

Release 1.0.6