Rename rng::Read trait method try_read

Author: eldruin

src/blocking/rng.rs

@@ -15,5 +15,5 @@ pub trait Read {
     ///
     /// If this function returns an error, it is unspecified how many bytes it has read, but it
     /// will never read more than would be necessary to completely fill the buffer.
-    fn read(&mut self, buffer: &mut [u8]) -> Result<(), Self::Error>;
+    fn try_read(&mut self, buffer: &mut [u8]) -> Result<(), Self::Error>;
 }