Update workflow.

.github/workflows/node.js.yml

@@ -78,16 +78,17 @@ jobs:
       run: echo "lockfile - $N_MAJOR"
 
     - run: npm ci
-      # The [`ci`][1] command was [introduced][2] with npm 6.x, and is intended
-      # to be used in continuous integration environments.  If npm 6.x or later
-      # is available, `npm ci` is executed to install dependencies.  Otherwise,
+      # The [`ci`][1] command was [introduced][2] with npm@5, and is intended to
+      # be used in continuous integration environments.  If npm@5 or later is
+      # installed, `npm ci` is executed to install dependencies.  Otherwise,
       # `npm install` is executed.
       #
       # [1]: https://docs.npmjs.com/cli/v10/commands/npm-ci
       # [2]: https://blog.npmjs.org/post/171556855892/introducing-npm-ci-for-faster-more-reliable
-      if: steps.npm-version.outputs.major >= 6
+      #if: steps.npm-version.outputs.major >= 6
+      if: steps.lockfile-versio.outputs.version != null
 
     - run: npm install
-      if: steps.npm-version.outputs.major < 6
+      if: steps.lockfile-version.outputs.version == null
 
     - run: npm test