Add the "endorsements" endpoints from mastodon 2.5.0

Closes #74

src/entities/relationship.rs

@@ -22,4 +22,10 @@ pub struct Relationship {
     pub domain_blocking: bool,
     /// Whether the user's reblogs will show up in the home timeline
     pub showing_reblogs: bool,
+    /// Whether the user is currently endorsing the account
+    ///
+    /// This field is not techincally nullable with mastodon >= 2.5.0, but
+    /// making it `Option<bool>` here means we shouldn't get deser errors when
+    /// making calls to pleroma or mastodon<2.5.0 instances
+    pub endorsed: bool,
 }

src/lib.rs

@@ -181,6 +181,7 @@ impl<H: HttpSend> MastodonClient<H> for Mastodon<H> {
         (get) notifications: "notifications" => Notification,
         (get) reports: "reports" => Report,
         (get (q: &'a str, #[serde(skip_serializing_if = "Option::is_none")] limit: Option<u64>, following: bool,)) search_accounts: "accounts/search" => Account,
+        (get) get_endorsements: "endorsements" => Account,
     }
 
     paged_routes_with_id! {
@@ -233,6 +234,8 @@ impl<H: HttpSend> MastodonClient<H> for Mastodon<H> {
         (get) get_filter: "filters/{}" => Filter,
         (delete) delete_filter: "filters/{}" => Empty,
         (delete) delete_from_suggestions: "suggestions/{}" => Empty,
+        (post) endorse_user: "accounts/{}/pin" => Relationship,
+        (post) unendorse_user: "accounts/{}/unpin" => Relationship,
     }
 
     fn add_filter(&self, request: &mut AddFilterRequest) -> Result<Filter> {

src/mastodon_client.rs

@@ -261,4 +261,16 @@ pub trait MastodonClient<H: HttpSend = HttpSender> {
     fn delete_from_suggestions(&self, id: u64) -> Result<Empty> {
         unimplemented!("This method was not implemented");
     }
+    /// GET /api/v1/endorsements
+    fn get_endorsements(&self) -> Result<Page<Account, H>> {
+        unimplemented!("This method was not implemented");
+    }
+    /// POST /api/v1/accounts/:id/pin
+    fn endorse_user(&self, id: u64) -> Result<Relationship> {
+        unimplemented!("This method was not implemented");
+    }
+    /// POST /api/v1/accounts/:id/unpin
+    fn unendorse_user(&self, id: u64) -> Result<Relationship> {
+        unimplemented!("This method was not implemented");
+    }
 }