fix(2164): Pure annotation is dropped on property values

[a-tarasyuk]

Fixes #2164

---

This PR adds the missing support for initializer trailing comments

// This is to ensure that we emit comment in the following case:
//      For example:
//          obj = {
//              id: /*comment1*/ ()=>void
//          }
// "comment1" is not considered to be leading comment for node.initializer
// but rather a trailing comment on the previous node.
const initializer = node.initializer;
if ((getEmitFlags(initializer) & EmitFlags.NoLeadingComments) === 0) {
    const commentRange = getCommentRange(initializer);
    emitTrailingCommentsOfPosition(commentRange.pos);
}