Fix parsing of error stacks where url paths contain @ symbols

Author: bengourley

dist/error-stack-parser.js

@@ -90,9 +90,10 @@
                         functionName: line
                     });
                 } else {
-                    var tokens = line.split('@');
-                    var locationParts = this.extractLocation(tokens.pop());
-                    var functionName = tokens.join('@') || undefined;
+                    var functionNameRegex = /((.*".+"[^@]*)?[^@]*)(?:@)/;
+                    var matches = line.match(functionNameRegex);
+                    var functionName = matches && matches[1] ? matches[1] : undefined;
+                    var locationParts = this.extractLocation(line.replace(functionNameRegex, ''));
 
                     return new StackFrame({
                         functionName: functionName,