And add rule "no-var" to eslintrc

Use eslint rule to check the diff between var and let:
    "no-use-before-define": "off"
    "@typescript-eslint/no-use-before-define": 2
    no-redeclare: 2
    block-scoped-var: 2
    no-loop-func: 2
(2) By the way add some eslint rule and unify some code style.

(I was originally planned to add dataType in click event, but finally modified quite a few files. Did I go too far?)
Add `dataType` to data and `getFormattedLabel` `getDataParams` `graphicEl`.
Enable series to maintain multiple datas (ig: in GraphSeries and SankeySeries).
Enable multiple datas sync when restoreData without trick in Graph.js.
Enable tooltip and click of edgeData without creating special dataModel.