changes for php 8.1
- add .gitignore. ignore lock file
- drupal/feeds:^3.0@alpha-> drupal/feeds:^3.0@beta
- drupal/feeds_ex:^1.0@alpha -> drupal/feeds_ex:^1.0@beta
- add patch for downstream dependencies php 8.1 compatibility: https://www.drupal.org/files/issues/2022-07-12/feeds_ex-jsonpath-08-3295611-2.patch