ci: add package-locks to test fixtures

Update path in cache-dependency-path, didn't look to be correct

Author: ericapisani

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
           cache: 'npm'
           cache-dependency-path: |
             **/package-lock.json
-            test/fixtures/**/package-lock.json
+            plugin/test/fixtures/**/package-lock.json
       - run: npm install
       - run: cd plugin && npm install && npm run build
       - run: npm test

plugin/test/fixtures/functions-without-gatsby-plugin/.gitignore

@@ -9,6 +9,4 @@ deployment.json
 
 # @netlify/plugin-gatsby ignores start
 netlify/functions/gatsby
-# @netlify/plugin-gatsby ignores end
-
-package-lock.json
+# @netlify/plugin-gatsby ignores end