[v3-beta][types] Improve types

[xr0master]

PR for topic

• improve type of generic chart type
• improve type for the Chart update method arguments
• allow to set/overwrite data an existing Chart instance
• added plugins argument for the chart configuration

[santam85]

I am getting
ERROR: .../node_modules/chart.js/helpers/chunks/index.d.ts:1285:1 - error TS1046: Top-level declarations in .d.ts files must start with either a 'declare' or 'export' modifier.

for declarations like:
enum UpdateModeEnum { resize = 'resize', reset = 'reset', none = 'none', hide = 'hide', show = 'show', normal = 'normal', active = 'active' }

I fixed it by adding declare.