v4.2.1

• refac/100% coverage e00e37b
• refac/ Return paths by key, not index 90a4840
• refac/ Deep graph clone adcc6ae
• feat/ getVertexByIndex 6b21a02
• feat/ Articulation vertices 624a76b
• Incoming features from graph algorithms dfa5632

v4.2.0...v4.2.1