Minify breaks Object constructor

[MichaelXF]

Describe the bug:

Minify breaks Object constructor

Config and Small code sample

Config:

{
  target: "node",
  minify: true
}

Code:

var MyClass = function(){};

var myObject = new MyClass();

Output:

var MyClass=()=>{},myObject=new MyClass

Error:

(node:44533) UnhandledPromiseRejectionWarning: TypeError: MyClass is not a constructor

Minify wants to convert the function to an arrow function, which breaks the new expression.