Release 2.20.0

37 new icons:

• cone-plus
• cube-off
• cube-plus
• cube
• cylinder-off
• cylinder-plus
• diabolo-off
• diabolo-plus
• diabolo
• frustum-off
• frustum-plus
• frustum
• hemisphere-off
• hemisphere-plus
• hemisphere
• hexagonal-prism-off
• hexagonal-prism-plus
• hexagonal-prism
• hexagonal-pyramid-off
• hexagonal-pyramid-plus
• hexagonal-pyramid
• irregular-polyhedron-off
• irregular-polyhedron-plus
• irregular-polyhedron
• octahedron-off
• octahedron-plus
• octahedron
• prism-off
• prism-plus
• prism
• pyramid-plus
• rectangular-prism-off
• rectangular-prism-plus
• rectangular-prism
• sphere-off
• sphere-plus
• sphere

Fixed icons: cone-2, cone-off, cone, cylinder, pyramid-off, pyramid