Release 1.33.0

18 new icons:

• cardboards
• ce
• certificate
• chart-radar
• christmas-tree
• drone
• gps
• manual-gearbox
• parachute
• pennant
• plant-2
• relation-many-to-many
• relation-one-to-many
• relation-one-to-one
• ripple
• sthetoscope
• view-360
• windmill

Fixed icons: brand-twitter, recycle, servicemark, trademark