(iOS) Support for ExtraBold alias of Heavy (font-weight 800)
(iOS) Support for ExtraBold alias of Heavy (font-weight 800)

Summary:
ExtraBold is a fairly common suffix in font naming. A good example is "Circe-ExtraBold". It's usually synonymous with Heavy or Black at font weight 800, as described here: https://www.webtype.com/info/articles/fonts-weights/

This fixes a regression with ExtraBold fonts introduced in d3007b0 where simply having an extrabold font will cause `weightOfFont` to choose this weight aggressively, resulting in all bold text erroneously interpreted as extrabold/heavy. This fix ensures that extrabold is detected before bold, and correctly attributed to `UIFontWeightHeavy`.
Closes https://github.com/facebook/react-native/pull/16323

Differential Revision: D6119059

Pulled By: shergin

fbshipit-source-id: 56a5c30584f220974308a7d6068c8d952aa20fb8

hoangpham95/react-native,kesha-antonov/react-native,javache/react-native,javache/react-native,janicduplessis/react-native,exponent/react-native,hammerandchisel/react-native,janicduplessis/react-native,rickbeerendonk/react-native,pandiaraj44/react-native,ptmt/react-native-macos,hoangpham95/react-native,facebook/react-native,arthuralee/react-native,rickbeerendonk/react-native,pandiaraj44/react-native,facebook/react-native,myntra/react-native,rickbeerendonk/react-native,hoangpham95/react-native,Bhullnatik/react-native,cdlewis/react-native,Bhullnatik/react-native,exponentjs/react-native,exponent/react-native,Bhullnatik/react-native,ptmt/react-native-macos,pandiaraj44/react-native,ptmt/react-native-macos,cdlewis/react-native,kesha-antonov/react-native,jevakallio/react-native,hoangpham95/react-native,Bhullnatik/react-native,myntra/react-native,dikaiosune/react-native,facebook/react-native,arthuralee/react-native,javache/react-native,facebook/react-native,exponent/react-native,ptmt/react-native-macos,hoangpham95/react-native,pandiaraj44/react-native,cdlewis/react-native,kesha-antonov/react-native,kesha-antonov/react-native,pandiaraj44/react-native,javache/react-native,rickbeerendonk/react-native,exponentjs/react-native,dikaiosune/react-native,javache/react-native,hammerandchisel/react-native,cdlewis/react-native,jevakallio/react-native,myntra/react-native,exponent/react-native,Bhullnatik/react-native,pandiaraj44/react-native,hoastoolshop/react-native,exponentjs/react-native,hoastoolshop/react-native,hoastoolshop/react-native,hoangpham95/react-native,rickbeerendonk/react-native,jevakallio/react-native,arthuralee/react-native,dikaiosune/react-native,hammerandchisel/react-native,ptmt/react-native-macos,hoastoolshop/react-native,ptmt/react-native-macos,dikaiosune/react-native,kesha-antonov/react-native,dikaiosune/react-native,janicduplessis/react-native,exponentjs/react-native,Bhullnatik/react-native,hammerandchisel/react-native,exponentjs/react-native,exponent/react-native,Bhullnatik/react-native,cdlewis/react-native,cdlewis/react-native,hoastoolshop/react-native,facebook/react-native,dikaiosune/react-native,arthuralee/react-native,janicduplessis/react-native,myntra/react-native,kesha-antonov/react-native,kesha-antonov/react-native,javache/react-native,hammerandchisel/react-native,myntra/react-native,exponentjs/react-native,facebook/react-native,rickbeerendonk/react-native,exponent/react-native,ptmt/react-native-macos,jevakallio/react-native,exponentjs/react-native,cdlewis/react-native,kesha-antonov/react-native,hoastoolshop/react-native,myntra/react-native,cdlewis/react-native,hoastoolshop/react-native,jevakallio/react-native,ptmt/react-native-macos,facebook/react-native,hoangpham95/react-native,janicduplessis/react-native,jevakallio/react-native,kesha-antonov/react-native,hammerandchisel/react-native,hoastoolshop/react-native,myntra/react-native,myntra/react-native,exponent/react-native,javache/react-native,rickbeerendonk/react-native,rickbeerendonk/react-native,exponentjs/react-native,janicduplessis/react-native,pandiaraj44/react-native,jevakallio/react-native,javache/react-native,pandiaraj44/react-native,Bhullnatik/react-native,dikaiosune/react-native,hammerandchisel/react-native,exponent/react-native,javache/react-native,facebook/react-native,arthuralee/react-native,jevakallio/react-native,myntra/react-native,facebook/react-native,hammerandchisel/react-native,hoangpham95/react-native,jevakallio/react-native,janicduplessis/react-native,rickbeerendonk/react-native,janicduplessis/react-native,cdlewis/react-native,dikaiosune/react-native