1.0.0-beta.6

[flowGL]

• Add supersampling property for supersampling antialiasing.
• Add particleType property. Which can be 'point', 'line'. The animation will look much smoother when particleType is 'line'

[Bug fixes]

• Fix can't find parseGeoJSON method bug. See apache/echarts#7079

[modules]

• Changed to ES6 module.