Added support for the new PRIORITY_SPEAKER permission (#360)

src/model/permissions.rs

@@ -196,6 +196,8 @@ __impl_bitflags! {
         ADD_REACTIONS = 0b0000_0000_0000_0000_0000_0000_0100_0000;
         // Allows viewing a guild's audit logs.
         VIEW_AUDIT_LOG = 0b0000_0000_0000_0000_0000_0000_1000_0000;
+        /// Allows the use of priority speaking in voice channels.
+        PRIORITY_SPEAKER = 0b0000_0000_0000_0000_0000_0001_0000_0000;
         /// Allows reading messages in a guild channel. If a user does not have
         /// this permission, then they will not be able to see the channel.
         READ_MESSAGES = 0b0000_0000_0000_0000_0000_0100_0000_0000;
@@ -304,6 +306,12 @@ impl Permissions {
     /// [View Audit Log]: constant.VIEW_AUDIT_LOG.html
     pub fn view_audit_log(&self) -> bool { self.contains(Self::VIEW_AUDIT_LOG) }
 
+    /// Shorthand for checking that the set of permission contains the
+    /// [Priority Speaker] permission.
+    ///
+    /// [Priority Speaker]: #associatedconstant.PRIORITY_SPEAKER
+    pub fn priority_speaker(&self) -> bool { self.contains(Self::PRIORITY_SPEAKER) }
+
     /// Shorthand for checking that the set of permissions contains the
     /// [Create Invite] permission.
     ///