fix MixChart and MultiViewChart

[sxzz]

• fix: fix MixChart for Vue 2
  Use mergeAttrs to merge props and attrs
• fix: remove data in MixChartProps/MultiViewChartProps

[vercel]

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[codecov]

Codecov Report

Merging #256 (ed4c83a) into master (4b0a2c3) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##            master      #256   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           34        34           
  Lines          142       142           
  Branches         8         8           
=========================================
  Hits           142       142           

Impacted Files	Coverage Δ
src/plots/multi-view/index.tsx	100.00% <ø> (ø)
src/plots/mix/index.tsx	100.00% <100.00%> (ø)

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