Lock cargo-afl to 0.15.19 to work around a coverage bug (#392)

Signed-off-by: Chris Hennick <[email protected]>

Author: Pr0methean

.github/workflows/ci.yaml

@@ -129,7 +129,7 @@ jobs:
       - uses: actions/checkout@v4
       - run: rustup toolchain add nightly && rustup default nightly && rustup component add clippy
 
-      - run: cargo install cargo-afl
+      - run: cargo install cargo-afl --version 0.15.19
 
       - name: cargo afl system-config
         run: cargo afl system-config
@@ -181,7 +181,7 @@ jobs:
       - uses: actions/checkout@v4
       - run: rustup toolchain add nightly && rustup default nightly && rustup component add clippy
 
-      - run: cargo install cargo-afl
+      - run: cargo install cargo-afl --version 0.15.19
 
       - name: cargo afl system-config
         run: cargo afl system-config
@@ -225,7 +225,7 @@ jobs:
       - uses: actions/checkout@v4
       - run: rustup toolchain add nightly && rustup default nightly && rustup component add clippy
 
-      - run: cargo install cargo-afl
+      - run: cargo install cargo-afl --version 0.15.19
 
       - name: cargo afl system-config
         run: cargo afl system-config
@@ -277,7 +277,7 @@ jobs:
       - uses: actions/checkout@v4
       - run: rustup toolchain add nightly && rustup default nightly && rustup component add clippy
 
-      - run: cargo install cargo-afl
+      - run: cargo install cargo-afl --version 0.15.19
 
       - name: cargo afl system-config
         run: cargo afl system-config