feat: highlight selected only

[lironhl]

Added highlightSelectedOnly prop, to allow only one star to be highlighted at the same time. @afc163 Can we merge this and release new version after this?

https://user-images.githubusercontent.com/12899161/143721196-0b1718cc-bcaa-402e-ba74-d8de5da08278.mp4

[codecov[bot]]

Codecov Report

Merging #135 (b728542) into master (a789bfb) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #135      +/-   ##
==========================================
+ Coverage   97.35%   97.36%   +0.01%     
==========================================
  Files           3        3              
  Lines         189      190       +1     
  Branches       50       51       +1     
==========================================
+ Hits          184      185       +1     
  Misses          5        5              

Impacted Files	Coverage Δ
src/Rate.tsx	100.00% <ø> (ø)
src/Star.tsx	97.36% <100.00%> (+0.07%)	:arrow_up:

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[lironhl]

@afc163 what do you think?