Fix keyExtractor placed on parent view

[hyochan]

Description

In 1.2.0 and 1.2.1, the keyExtractor was placed in the wrong view. Place this to correct child view.

Sorry for inconvenience 🙏

Related Issues

#10

Tests

N/A

Checklist

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
• Run yarn lint && yarn tsc
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[codecov]

Codecov Report

Merging #33 (4fe59f4) into main (7229a50) will not change coverage.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##              main       #33   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           36        36           
  Branches        13        13           
=========================================
  Hits            36        36           

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
index.tsx	100.00% <100.00%> (ø)

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