build: update cargo-bolero from 0.8.0 to 0.13.3

New `fuzz` profile is added
because cargo-bolero now requires it and uses
by default, while `--release` option is removed.

Instructions for running AFL are removed from the README
because it requires some system reconfiguration
and I did not test it this time.

Cargo.toml

@@ -18,6 +18,9 @@ opt-level = 1
 debug = 1
 opt-level = 0
 
+[profile.fuzz]
+inherits = "test"
+
 # Always optimize dependencies.
 # This does not apply to crates in the workspace.
 # <https://doc.rust-lang.org/cargo/reference/profiles.html#overrides>