Remove deprecated fields

[icebob]

In v2.x version we need to remove the deprecated fields. You can use the input field with inputType property instead of them.

Deprecated fields:

• color
  Change { type: "color" } to { type: "input", inputType: "color" }

• email
  Change { type: "email" } to { type: "input", inputType: "email" }

• number
  Change { type: "number" } to { type: "input", inputType: "number" }

• password
  Change { type: "password" } to { type: "input", inputType: "password" }

• range
  Change { type: "range" } to { type: "input", inputType: "range" }

• text
  Change { type: "text" } to { type: "input", inputType: "text" }

• update docs & readme

[cristijora]

Nice. Will keep things more simple and clear

[lionel-bijaoui]

While I was moving fields around with #121, I also removed the designated fields.