minor protocol_version fixes

src/master_playlist.rs

@@ -158,7 +158,7 @@ impl MasterPlaylistBuilder {
                     .flatten(),
             )
             .max()
-            .unwrap_or(ProtocolVersion::V7)
+            .unwrap_or(ProtocolVersion::latest())
     }
 
     fn validate_stream_inf_tags(&self) -> crate::Result<()> {

src/media_playlist.rs

@@ -200,7 +200,7 @@ impl MediaPlaylistBuilder {
                     .unwrap_or(ProtocolVersion::V1)
             }))
             .max()
-            .unwrap_or(ProtocolVersion::V1)
+            .unwrap_or(ProtocolVersion::latest())
     }
 
     /// Adds a media segment to the resulting playlist.

src/types/initialization_vector.rs

@@ -13,6 +13,7 @@ use crate::Error;
 pub struct InitializationVector(pub [u8; 16]);
 
 impl InitializationVector {
+    /// Converts the initialization vector to a slice.
     pub const fn to_slice(&self) -> [u8; 16] {
         self.0
     }

src/types/protocol_version.rs

@@ -17,6 +17,14 @@ pub enum ProtocolVersion {
     V6,
     V7,
 }
+
+impl ProtocolVersion {
+    /// Returns the newest ProtocolVersion, that is supported by this library.
+    pub const fn latest() -> Self {
+        Self::V7
+    }
+}
+
 impl fmt::Display for ProtocolVersion {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let n = {
@@ -33,6 +41,7 @@ impl fmt::Display for ProtocolVersion {
         write!(f, "{}", n)
     }
 }
+
 impl FromStr for ProtocolVersion {
     type Err = Error;