Chaincraft v0.4.3r2 - Chubut

What's Changed

• Update node.py max message size by @jose-blockchain in #60
• remove vuln dep ecdsa not used currently by @jose-blockchain in #61
• setup-python to v4 python-app.yml by @jose-blockchain in #62
• Upgrade python-coverage.yml by @jose-blockchain in #63
• Update publish-to-pypi.yml by @jose-blockchain in #64

Full Changelog: v0.4.1-minerva-fixed2...v0.4.3r2