Frappe Charts v1.2.0

Releasing version v1.2.0.
These following are the changes made to the library in the past one month.

Feats

• Donut Charts 🎉, Contributed by @ratnajeetshyamkunwar (#221)

Fixes

• fix: node-sass xcode rebuild issue (#225)
• Fix piechart large arc (#181)

Docs

• Updated docs for es-modules like VueJS to work (import correction and including css) #206
  #206