Merge #272: fix: enable fuzzing with cargo-fuzz

f7af079 fix: enable fuzzing with cargo-fuzz (metalurgical)

Pull request description:

  This enables fuzzing of targets using cargo-fuzz on github actions where it previously was ignored.

  Changes:
  - Install cargo fuzz
  - Run cargo fuzz for each target

  Can be updated to use mapfile or parameterized in future.

ACKs for top commit:
  apoelstra:
    ACK f7af079; successfully ran local tests; simple and straightforward
  KyrylR:
    ACK f7af079; successfully ran local tests; code review

Tree-SHA512: 5176699913aa31d15ba1d8b05cc6f831043705ff5980ddd09396737531eee088c2c0c868ddabdb3f869618995e2cb77e3cb0bc34a9baebc7b61be4a5a8603d83

Author: KyrylR

.github/workflows/rust.yml

@@ -189,3 +189,14 @@ jobs:
         run: |
           cargo check --manifest-path=fuzz/Cargo.toml
 
+      - name: "Install cargo-fuzz"
+        run: |
+          cargo install cargo-fuzz --locked
+
+      - name: "Run cargo-fuzz"
+        run: |
+          set -euo pipefail
+          cargo fuzz list --fuzz-dir fuzz | while read -r target; do
+          echo "fuzzing $target"
+          cargo fuzz run --fuzz-dir fuzz "$target" -- -runs=1
+          done