chore: add short-lived caching of grype db

Signed-off-by: Keith Zantow <kzantow@gmail.com>

.gitattributes

@@ -0,0 +1,4 @@
+# force unix line endings for consistent ncc output
+*.js text eol=lf
+package.json text eol=lf
+package-lock.json text eol=lf

.github/workflows/test.yml

@@ -12,11 +12,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
+      - run: node --version
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
       - run: npm ci
       - run: npm run audit
       - run: npm run build
       - run: git status --porcelain
-      - run: git diff
+      - run: git diff --ws-error-highlight=all | cat -v
       - run: git diff --exit-code
 
   test:
@@ -53,22 +57,22 @@ jobs:
           path: ./
 
       - name: "Donwload Grype v0.54.0"
+        id: grype
         uses: ./download-grype # anchore/scan-action/download-grype
         with:
           grype-version: v0.54.0
 
       - name: "Check Grype version before scan-action"
-        run: grype version | egrep "^Version:.*0.54.0$"
+        run: ${{ steps.grype.outputs.cmd }} version | egrep "^Version:.*0.54.0$"
 
       - name: "Scan test image"
         uses: ./
         with:
           image: "alpine:latest"
-          grype-version: v0.54.0 # set the same version to test that current Grype binary wasn't overwritten by the latest version
           fail-build: false # to prevent fail due to vuln:s on test image
 
       - name: "Check Grype version after scan-action"
-        run: grype version | egrep "^Version:.*0.54.0$"
+        run: ${{ steps.grype.outputs.cmd }} version | egrep "^Version:.*0.54.0$"
 
   test-all:
     strategy: