(#5798) - set terser to minify with option ascii_only=true

so the unicode characters the code uses are rendered with /ux0000 syntax and no encoding problems occur when using the minified version

Author: katlimruiz

bin/build-utils.js

@@ -29,7 +29,7 @@ function writeFile(filename, contents) {
 }
 
 function doUglify(pkgName, code, prepend, fileOut) {
-  var miniCode = prepend + terser.minify(code).code;
+  var miniCode = prepend + terser.minify(code, { output: { ascii_only: true }}).code;
   return writeFile(addPath(pkgName, fileOut), miniCode);
 }