Added missing fields to various structs and sorted them in the same order as
the original mastodon API documentation does. This should make it easier to
compare go-mastodon's structs with the original documentation.
Coverage remained the same at 91.403% when pulling 89a3c399a20b2b2a16ed9c6cfb99611e2e613970 on muesli:api-v2.6.0 into c5945152ec75beb206ec117434e57084a4fca2dc on mattn:master.
Added missing fields to various structs and sorted them in the same order as the original mastodon API documentation does. This should make it easier to compare go-mastodon's structs with the original documentation.