Use explicit imports (#4399)

Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: ernestognw <ernestognw@gmail.com>

scripts/generate/templates/EnumerableMap.js

@@ -12,7 +12,7 @@ const TYPES = [
 const header = `\
 pragma solidity ^0.8.19;
 
-import "./EnumerableSet.sol";
+import {EnumerableSet} from "./EnumerableSet.sol";
 
 /**
  * @dev Library for managing an enumerable variant of Solidity's