V0.30.0 Released

Features

• Replace TileLayer's dom renderer with gl renderer (webgl)
• Add a new event "mouseenter" in geometry's events
• Add "canvascreate" event in CanvasRenderer
• Add support of "identity" in function-type
• Add "drawAltitude" for geometry with altitude
• Add support of seperate altitude for each vertex of LineString

Fixes

• Fix overview control perspective with pitch and rotation
• Fix text's dxdy with rotation
• Fix once's off in Eventable

Breaking changes

• Rename VectorLayer "enableHeight" to "enableAltitude", "heightProperty" to "altitudeProperty", and change default altitude property to "altitude"
• Change attribution control's default position