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Optimize bundle size by decreasing size country map (#44)

* Optimize bundel size by decreasing size country map.

* Fix prettier errors.

* Fix linting errors.

* Fix prettier errors.

* Add entry to changelog.

* Add tests.

* Add checks for undefined chars property.

Co-authored-by: Richard Leurs <7275740+EarthlingRich@users.noreply.github.com>

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