fix(demo): add Intl polyfill [fixes #2215]

[IlyaSurmay]

No description provided.

[codecov]

Codecov Report

Merging #2238 into development will increase coverage by <.01%.
The diff coverage is 100%.

@@               Coverage Diff               @@
##           development    #2238      +/-   ##
===============================================
+ Coverage        87.45%   87.46%   +<.01%     
===============================================
  Files               95       95              
  Lines             2679     2681       +2     
  Branches           358      358              
===============================================
+ Hits              2343     2345       +2     
  Misses             214      214              
  Partials           122      122

Impacted Files	Coverage Δ
demo/src/polyfills.ts	100% <100%> (ø)	⬆️

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