Add a nodejs10-publish-to-npm project template

Like the nodejs{4,6,8}-publish-to-npm templates, 10 seems to be the
first version which can run on ubuntu-focal nodes so add it as an
option.

Change-Id: Ic3f806e701b334985632d0969863cd902a653a1d

zuul.d/project-templates.yaml

@@ -1643,6 +1643,25 @@
             dependencies:
               - release-openstack-javascript
 
+- project-template:
+    name: nodejs10-publish-to-npm
+    description: |
+      Runs publish jobs and tarball generation for Javascript.
+      Uses NodeJS version 10.
+    post:
+      jobs:
+        - publish-openstack-javascript-tarball:
+            vars:
+              node_version: 10
+    release:
+      jobs:
+        - release-openstack-javascript:
+            vars:
+              node_version: 10
+        - announce-release:
+            dependencies:
+              - release-openstack-javascript
+
 - project-template:
     name: translation-jobs-master-only
     description: |