feat(Calendar): add lazy-render prop

[chenjiahan]

No description provided.

[codecov-io]

Codecov Report

Merging #6245 into dev will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##              dev    #6245   +/-   ##
=======================================
  Coverage   91.50%   91.50%           
=======================================
  Files         171      171           
  Lines        4483     4484    +1     
  Branches      293      293           
=======================================
+ Hits         4102     4103    +1     
  Misses        338      338           
  Partials       43       43           

Impacted Files	Coverage Δ
src/calendar/index.js	100.00% <ø> (ø)
src/calendar/components/Month.js	100.00% <100.00%> (ø)

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