on macos, let's use caches too for speedup (#384)

This way, linux will always run the scripts, whereas macos
and linux can leverage the time savings through extraction.

Author: Byron

.github/workflows/ci.yml

@@ -26,6 +26,8 @@ jobs:
       if: startsWith(matrix.os, 'macos')
       run:
         brew install tree openssl
+    - run: git lfs fetch && git lfs checkout
+      if: startsWith(matrix.os, 'macos')
     - name: test
       env:
         CI: true
@@ -47,7 +49,7 @@ jobs:
         with:
           command: check
           args: --all --bins --tests --examples
-      - run: git lfs fetch && git lfs checkout && cargo test --package git-ref -- --nocapture
+      - run: git lfs fetch && git lfs checkout
       - name: "Test (crossterm)"
         uses: actions-rs/cargo@v1
         with: