Replace flag images with emoji

We can use emoji for most of these flags, which should make
them look better on higher resolution displays and improve the
loading performance of the style guide a little.

The only flag we have here that does not have a good emoji yet
is the flag of Catalonia, which I left as-is for now.

https://emojipedia.org/flag-for-catalonia-esct/

Author: lencioni

README.md

@@ -3640,22 +3640,22 @@ Other Style Guides
 
   This style guide is also available in other languages:
 
-  - ![br](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Brazil.png) **Brazilian Portuguese**: [armoucar/javascript-style-guide](https://github.com/armoucar/javascript-style-guide)
-  - ![bg](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Bulgaria.png) **Bulgarian**: [borislavvv/javascript](https://github.com/borislavvv/javascript)
+  - 🇧🇷 **Brazilian Portuguese**: [armoucar/javascript-style-guide](https://github.com/armoucar/javascript-style-guide)
+  - 🇧🇬 **Bulgarian**: [borislavvv/javascript](https://github.com/borislavvv/javascript)
   - ![ca](https://raw.githubusercontent.com/fpmweb/javascript-style-guide/master/img/catala.png) **Catalan**: [fpmweb/javascript-style-guide](https://github.com/fpmweb/javascript-style-guide)
-  - ![cn](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/China.png) **Chinese (Simplified)**: [yuche/javascript](https://github.com/yuche/javascript)
-  - ![tw](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Taiwan.png) **Chinese (Traditional)**: [jigsawye/javascript](https://github.com/jigsawye/javascript)
-  - ![fr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/France.png) **French**: [nmussy/javascript-style-guide](https://github.com/nmussy/javascript-style-guide)
-  - ![de](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Germany.png) **German**: [timofurrer/javascript-style-guide](https://github.com/timofurrer/javascript-style-guide)
-  - ![it](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Italy.png) **Italian**: [sinkswim/javascript-style-guide](https://github.com/sinkswim/javascript-style-guide)
-  - ![jp](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Japan.png) **Japanese**: [mitsuruog/javascript-style-guide](https://github.com/mitsuruog/javascript-style-guide)
-  - ![kr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/South-Korea.png) **Korean**: [ParkSB/javascript-style-guide](https://github.com/ParkSB/javascript-style-guide)
-  - ![ru](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Russia.png) **Russian**: [leonidlebedev/javascript-airbnb](https://github.com/leonidlebedev/javascript-airbnb)
-  - ![es](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Spain.png) **Spanish**: [paolocarrasco/javascript-style-guide](https://github.com/paolocarrasco/javascript-style-guide)
-  - ![th](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Thailand.png) **Thai**: [lvarayut/javascript-style-guide](https://github.com/lvarayut/javascript-style-guide)
-  - ![tr](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Turkey.png) **Turkish**: [eraycetinay/javascript](https://github.com/eraycetinay/javascript)
-  - ![ua](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Ukraine.png) **Ukrainian**: [ivanzusko/javascript](https://github.com/ivanzusko/javascript)
-  - ![vn](https://raw.githubusercontent.com/gosquared/flags/master/flags/flags/shiny/24/Vietnam.png) **Vietnam**: [hngiang/javascript-style-guide](https://github.com/hngiang/javascript-style-guide)
+  - 🇨🇳 **Chinese (Simplified)**: [yuche/javascript](https://github.com/yuche/javascript)
+  - 🇹🇼 **Chinese (Traditional)**: [jigsawye/javascript](https://github.com/jigsawye/javascript)
+  - 🇫🇷 **French**: [nmussy/javascript-style-guide](https://github.com/nmussy/javascript-style-guide)
+  - 🇩🇪 **German**: [timofurrer/javascript-style-guide](https://github.com/timofurrer/javascript-style-guide)
+  - 🇮🇹 **Italian**: [sinkswim/javascript-style-guide](https://github.com/sinkswim/javascript-style-guide)
+  - 🇯🇵 **Japanese**: [mitsuruog/javascript-style-guide](https://github.com/mitsuruog/javascript-style-guide)
+  - 🇰🇷 **Korean**: [ParkSB/javascript-style-guide](https://github.com/ParkSB/javascript-style-guide)
+  - 🇷🇺 **Russian**: [leonidlebedev/javascript-airbnb](https://github.com/leonidlebedev/javascript-airbnb)
+  - 🇪🇸 **Spanish**: [paolocarrasco/javascript-style-guide](https://github.com/paolocarrasco/javascript-style-guide)
+  - 🇹🇭 **Thai**: [lvarayut/javascript-style-guide](https://github.com/lvarayut/javascript-style-guide)
+  - 🇹🇷 **Turkish**: [eraycetinay/javascript](https://github.com/eraycetinay/javascript)
+  - 🇺🇦 **Ukrainian**: [ivanzusko/javascript](https://github.com/ivanzusko/javascript)
+  - 🇻🇳 **Vietnam**: [hngiang/javascript-style-guide](https://github.com/hngiang/javascript-style-guide)
 
 ## The JavaScript Style Guide Guide