chore(node): handle when package.json does not have a version (#300)

Source-Link: googleapis/synthtool@2643dfe
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest@sha256:079b0f3bd8427671745ec03a5179575b4c86a4e776fb6041427e553719c65c2b
Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

.github/.OwlBot.lock.yaml

@@ -13,5 +13,5 @@
 # limitations under the License.
 docker:
   image: gcr.io/cloud-devrel-public-resources/owlbot-nodejs:latest
-  digest: sha256:d106724ad2a96daa1b8d88de101ba50bdb30b8df62ffa0aa2b451d93b4556641
-# created: 2022-04-20T16:59:29.058398639Z
+  digest: sha256:079b0f3bd8427671745ec03a5179575b4c86a4e776fb6041427e553719c65c2b
+# created: 2022-05-10T15:57:49.166896548Z

.github/auto-approve.yml

@@ -1,12 +1,3 @@
-rules:
-- author: "release-please[bot]"
-  title: "^chore: release"
-  changedFiles:
-  - "package\\.json$"
-  - "CHANGELOG\\.md$"
-  maxFiles: 3
-- author: "renovate-bot"
-  title: "^(fix|chore)\\(deps\\):"
-  changedFiles: 
-  - "package\\.json$"
-  maxFiles: 2
+processes:
+  - "NodeDependency"
+  - "OwlBotTemplateChanges"