Update to latest releases of workflow actions (#364)

Author: jgraham

.github/workflows/auto-publish.yml

@@ -7,7 +7,7 @@ jobs:
   deploy:
     runs-on: ubuntu-20.04
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v3
     - uses: w3c/spec-prod@v2
       with:
         GH_PAGES_BRANCH: gh-pages

.github/workflows/test.yml

@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-python@v3
         with:
           # Python 3.11 is broken: https://github.com/tabatkins/bikeshed/issues/2386
@@ -20,10 +20,10 @@ jobs:
   cddl:
     runs-on: ubuntu-20.04
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
-          node-version: 14.x
+          node-version: 16
       - name: Get cddl version
         run: curl -s https://crates.io/api/v1/crates/cddl | python3 -c "import sys, json; print(json.load(sys.stdin)['crate']['max_stable_version'])" | tee cddl.txt
       - name: "Cache rust binaries"