adding node 18 (#711)

* dropping node 14

* updating github actions

* missing action name update

* reusing node 14

* package.json regenerated

Author: Janther

.github/workflows/CI.yml

@@ -33,7 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [14, 16]
+        node: [14, 16, 18]
     steps:
       - uses: actions/setup-node@v1
         with: