deps: update to use nodev16

Node 12 has an end of life on April 30, 2022.
This PR updates the default runtime to [node16](https://github.blog/changelog/2021-12-10-github-actions-github-hosted-runners-now-run-node-js-16-by-default/), rather then node12.
This is supported on all Actions Runners v2.285.0 or later.

Signed-off-by: Rui Chen <rui@chenrui.dev>

.github/workflows/test.yml

@@ -7,12 +7,12 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Setup Node.js
-        uses: actions/setup-node@v2
+        uses: actions/setup-node@v3
         with:
-          node-version: '12.x'
-          cache: 'npm'
+          node-version: "16.x"
+          cache: "npm"
       - run: npm ci
       - name: Run tests
         run: |

action.yml

@@ -1,9 +1,9 @@
 name: bump-homebrew-formula
-description: 'Bump Homebrew formula after a new release'
-author: '@mislav'
+description: "Bump Homebrew formula after a new release"
+author: "@mislav"
 runs:
-  using: node12
-  main: './lib/index.js'
+  using: node16
+  main: "./lib/index.js"
 inputs:
   formula-name:
     description: The name of the Homebrew formula (defaults to lower-cased repository name)