refactor: use toString for readability

Author: anonrig

lib/stringify.js

@@ -9,12 +9,12 @@ function getAsPrimitive(value) {
     // Length check is handled inside encodeString function
     return encodeString(value);
   } else if (type === "bigint") {
-    return value + "";
+    return value.toString();
   } else if (type === "boolean") {
     return value ? "true" : "false";
   } else if (type === "number" && Number.isFinite(value)) {
-    if (Math.abs(value) < 1e21) return value + "";
-    return encodeString(value + "");
+    if (Math.abs(value) < 1e21) return value.toString();
+    return encodeString(value.toString());
   }
 
   return "";