fix: resolve cargo-deny license failures and code coverage toolchain issue

- Add missing licenses to allow list: Unicode-3.0, Zlib, CDLA-Permissive-2.0
- Fix code coverage workflow by adding missing toolchain parameter

Resolves failing CI checks in PR #23.

Author: joshrotenberg

.github/workflows/ci.yml

@@ -58,6 +58,8 @@ jobs:
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@7b1c307e0dcbda6122208f10795a713336a9b35a  # stable
+        with:
+          toolchain: stable
 
       - name: Cache cargo
         uses: Swatinem/rust-cache@82a92a6e8fbeee089604da2575dc567ae9ddeaab  # v2.7.5

deny.toml

@@ -25,9 +25,12 @@ allow = [
     "BSD-3-Clause",
     "ISC",
     "Unicode-DFS-2016",
+    "Unicode-3.0",
     "CC0-1.0",
     "MPL-2.0",
     "Unlicense",
+    "Zlib",
+    "CDLA-Permissive-2.0",
 ]
 
 confidence-threshold = 0.8