Fix issue with non-native emoji output in demo app.

[serebrov]

When using custom emojis (like parrot), they are shown as 'undefined' in the output row:

This PR adds another row, with Emoji components as output (also keeps the original row with native emojis, but inserts ? instead of undefined for emojis without native representation).

[codecov-commenter]

Codecov Report

Merging #145 (0c34d6b) into master (924e131) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #145   +/-   ##
=======================================
  Coverage   89.21%   89.21%           
=======================================
  Files          16       16           
  Lines         788      788           
  Branches      157      157           
=======================================
  Hits          703      703           
  Misses         79       79           
  Partials        6        6           

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