fix: parsing for N transform function name. (#1055)

* Add files via upload

N transform function name fix

* Add files via upload

* Update sig.js

Author: gatecrasher777

lib/sig.js

@@ -55,7 +55,8 @@ exports.extractFunctions = body => {
     }
   };
   const extractNCode = () => {
-    const functionName = utils.between(body, `&&(b=a.get("n"))&&(b=`, `(b)`);
+    let functionName = utils.between(body, `&&(b=a.get("n"))&&(b=`, `(b)`);
+    if (functionName.includes('[')) functionName = utils.between(body, `${functionName.split('[')[0]}=[`, `]`);
     if (functionName && functionName.length) {
       const functionStart = `${functionName}=function(a)`;
       const ndx = body.indexOf(functionStart);