ci: drop Node.js 14 and 16 from matrix (#2531)

* ci: drop Node 14 and 16 from matrix

* ci: lint matrix versions

Author: wellwelwel

.github/workflows/ci-linux.yml

@@ -18,7 +18,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14.x, 16.x, 18.x, 20.x, "21.x"]
+        node-version: [18.x, 20.x, 21.x]
         mysql-version: ["mysql:8.0.33"]
         use-compression: [0, 1]
         use-tls: [0, 1]