Update README.md

Author: feross

README.md

@@ -445,7 +445,7 @@ Or, add this to `package.json`:
 
 ## How do I use experimental JavaScript (ES Next) features?
 
-`standard` supports the latest JavaScript features, ES8 (ES2017), including
+`standard` supports the latest ECMAScript features, ES8 (ES2017), including
 language feature proposals that are in "Stage 4" of the proposal process.
 
 To support experimental language features, `standard` supports specifying a