v0.8.18

• updates documentation (39135be)
• fix(package): update d3plus-shape to version 0.16.0 (bda2621)
• fix(package): update d3plus-shape to version 0.15.0 (9d242b7)
• Fix d3plus/d3plus-viz#86 (8cbbba2)
• updates package-lock.json (6c03895)
• updates d3-interpolate to v1.2.0 (18ce4ed)
• updates minor d3plus dependencies (6edf7a3)