fix: safe encode bits to check for 2^num_bits <= byte we are encoding

fix: I thought namedDeBruijn takes advantage of Binder for encoding and decoding.
It does not...
fix: Debruijn was being converted to NamedDeBruijn incorrectly

crates/flat-rs/src/encode/encoder.rs

@@ -320,6 +320,6 @@ impl Encoder {
             self.buffer.push(chunk.len() as u8);
             self.buffer.extend(chunk);
         }
-        self.buffer.push(0);
+        self.buffer.push(0_u8);
     }
 }