Duplicate variable declarations with destructuring are partially converted to let/const

[Rene Saarsoo]

For example, the below code should not be converted to let/const:

   var a = 1;
   var {a, b} = createObj();

Lebab understand that a is a repeated variable, but ignores the fact that b is declared together with it and attempts to convert it to const:

   var a = 1;
   const {a, b} = createObj();