Fix width calc with unicode

lib/calc-text-width.js

@@ -11,7 +11,7 @@ function calcWidth (charWidthTable) {
       return 0
     } else {
       return Array.from(text).reduce((total, curr) => {
-        return total + widthTable[curr.charCodeAt()] || widthTable[64] // "@"
+        return total + (widthTable[curr.charCodeAt()] || widthTable[64]) // "@"
       }, 0)
     }
   }