cargo: reduce crate size by excluding fuzz/ and record/

The `fuzz/` and `record/` directories are about 2MiB, and are not used
by the end user. This removes them from the crate for future publishes.

Also, this avoids risk of an [xz-style attack] leveraging the binary
files produced by fuzzing, where malicious code could be slipped in
past review through binary test data.

PR #1281

[zx-style attack]: https://en.wikipedia.org/wiki/XZ_Utils_backdoor

Author: erickt

Cargo.toml

@@ -13,7 +13,7 @@ finite automata and guarantees linear time matching on all inputs.
 """
 categories = ["text-processing"]
 autotests = false
-exclude = ["/scripts/*", "/.github/*"]
+exclude = ["/fuzz/*", "/record/*", "/scripts/*", "/.github/*"]
 edition = "2021"
 rust-version = "1.65"