Remove Node v12 support, add Node v16 build (#369)

Author: vkartk

.github/workflows/build.yml

@@ -9,11 +9,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: ["12", "14", "16"]
+        node: [14.x, 16.x, 18.x]
     name: Node v${{ matrix.node }}
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v1
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
       - run: sudo apt-get install -y redis-server

package.json

@@ -25,7 +25,7 @@
     "redis-v4": "npm:redis@4"
   },
   "engines": {
-    "node": ">=12"
+    "node": ">=14"
   },
   "bugs": {
     "url": "https://github.com/tj/connect-redis/issues"