fix: use undefined as default Popup props

[stepankuzmin]

Relates to #403 mapbox/mapbox-gl-js#11955

[github-actions]

size-limit report 📦

Path	Size	Loading time (3g)	Running time (snapdragon)	Total time
dist/react-map-gl.cjs.js	7.58 KB (+0.06% 🔺)	152 ms (+0.06% 🔺)	21 ms (-46.89% 🔽)	173 ms
dist/react-map-gl.esm.js	7.61 KB (+0.06% 🔺)	153 ms (+0.06% 🔺)	24 ms (-25.78% 🔽)	177 ms

[codecov]

Codecov Report

Merging #402 (22c370f) into main (566ac64) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #402   +/-   ##
=======================================
  Coverage   97.96%   97.96%           
=======================================
  Files          28       28           
  Lines         738      738           
  Branches      189      189           
=======================================
  Hits          723      723           
  Misses         11       11           
  Partials        4        4           

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

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