Add 4 codepoints commonly used to write Turkish text to our table
of 'commonly used' Unicode codepoints. These are:
• U+011F LATIN SMALL LETTER G WITH BREVE
• U+0130 LATIN CAPITAL LETTER I WITH DOT ABOVE
• U+0131 LATIN SMALL LETTER DOTLESS I
• U+015F LATIN SMALL LETTER S WITH CEDILLA