Revert "perf(toNumber): use +value to convert binary/octal/hexadecimal string (#4230)"

This reverts commit 7084300d34.

lodash.js

@@ -177,9 +177,18 @@
   /** Used to match `RegExp` flags from their coerced string values. */
   var reFlags = /\w*$/;
 
+  /** Used to detect bad signed hexadecimal string values. */
+  var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+
+  /** Used to detect binary string values. */
+  var reIsBinary = /^0b[01]+$/i;
+
   /** Used to detect host constructors (Safari). */
   var reIsHostCtor = /^\[object .+?Constructor\]$/;
 
+  /** Used to detect octal string values. */
+  var reIsOctal = /^0o[0-7]+$/i;
+
   /** Used to detect unsigned integer values. */
   var reIsUint = /^(?:0|[1-9]\d*)$/;
 
@@ -400,7 +409,8 @@
   };
 
   /** Built-in method references without a dependency on `root`. */
-  var freeParseFloat = parseFloat;
+  var freeParseFloat = parseFloat,
+      freeParseInt = parseInt;
 
   /** Detect free variable `global` from Node.js. */
   var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
@@ -12458,7 +12468,11 @@
       if (typeof value != 'string') {
         return value === 0 ? value : +value;
       }
-      return +value;
+      value = value.replace(reTrim, '');
+      var isBinary = reIsBinary.test(value);
+      return (isBinary || reIsOctal.test(value))
+        ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
+        : (reIsBadHex.test(value) ? NAN : +value);
     }
 
     /**