Ignore byte_char_slices clippy lint in test

    warning: can be more succinctly written as a byte str
        --> tests/test.rs:1108:13
         |
    1108 |             &[b'"', b'\n', b'"'],
         |             ^^^^^^^^^^^^^^^^^^^^ help: try: `b"\"\n\""`
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#byte_char_slices
         = note: `-W clippy::byte-char-slices` implied by `-W clippy::all`
         = help: to override `-W clippy::all` add `#[allow(clippy::byte_char_slices)]`

    warning: can be more succinctly written as a byte str
        --> tests/test.rs:1112:13
         |
    1112 |             &[b'"', b'\x1F', b'"'],
         |             ^^^^^^^^^^^^^^^^^^^^^^ help: try: `b"\"\x1F\""`
         |
         = help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#byte_char_slices

tests/test.rs

@@ -1,5 +1,6 @@
 #![allow(
     clippy::assertions_on_result_states,
+    clippy::byte_char_slices,
     clippy::cast_precision_loss,
     clippy::derive_partial_eq_without_eq,
     clippy::excessive_precision,