fix: switch ci to nightly

Author: psteinroe

.github/workflows/ci.yml

@@ -27,8 +27,8 @@ jobs:
 
  - name: 📦 Build
  id: build
- run: cargo build
+ run: cargo +nightly build
 
  - name: 🦺 Test
  id: test
- run: cargo test
+ run: cargo +nightly test