• Updated Leaflet dependency to v1.4.
• Fixed duplicate element creation in Path (PR #549 by vadzim).
• Changed whenReady logic in Map to get triggered after React reference is bound.
• [internal] Replaced lodash with fast-deep-equal and vanilla JS implementations (PR #554 by jtfell).
• [website] Added react-leaflet-semicircle plugin (PR #552 by clementallen).