Inconsistent country variation: Singapore

[baltpeter]

We've decided that Singapore should be written as "Republic of Singapore":

data/src/checks/record/end-address-in-country.ts

Line 5 in 6aaea30

const country_name_variations = ['United States of America', 'The Netherlands', 'Republic of Singapore'];

But we also allow the native property from the countries-list library:

data/src/checks/record/end-address-in-country.ts

Lines 16 to 20 in 6aaea30

	const isCountry = (str: string) =>
	Object.entries(countries).some(
	([country_code, c]) =>
	(!variation_country_codes.includes(country_code) && str == c.name) || str === c.native
	) || country_name_variations.includes(str);

And that's "Singapore" in that case. We currently have records with both variations.