[proposal-object-rest-spread] fix templateLiteral in extractNormalizedKeys (#9628)

Added additional check in extractNormalizedKeys function to handle templates differently than string.

packages/babel-plugin-proposal-object-rest-spread/src/index.js

@@ -76,6 +76,8 @@ export default declare((api, opts) => {
       if (t.isIdentifier(prop.key) && !prop.computed) {
         // since a key {a: 3} is equivalent to {"a": 3}, use the latter
         keys.push(t.stringLiteral(prop.key.name));
+      } else if (t.isTemplateLiteral(prop.key)) {
+        keys.push(t.cloneNode(prop.key));
       } else if (t.isLiteral(prop.key)) {
         keys.push(t.stringLiteral(String(prop.key.value)));
       } else {