The new add config is minMargin instead of margin is for not breaking the previous code using margin.

feature: custom series, add "extra" in el options for users to config their own properties for animation.

Custom series enhancement (for-next)

# Conflicts:
#	src/util/graphic.ts

core(ci): only run unit test on master or release branch

fix: little modify in during api: add return this to setter and change name from "setAttr" to "setTransform".