fix vitest on different node

.github/workflows/linux.yml

@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x, 21.x]
+        node-version: [18.x, 20.x, 21.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

.github/workflows/windows.yml

@@ -12,7 +12,7 @@ jobs:
 
     strategy:
       matrix:
-        node-version: [16.x, 18.x, 20.x, 21.x]
+        node-version: [18.x, 20.x, 21.x]
         # See supported Node.js release schedule at https://nodejs.org/en/about/releases/
 
     steps:

vitest.config.mjs

@@ -0,0 +1,10 @@
+import { defineConfig } from 'vitest/config';
+
+export default defineConfig({
+  test: {
+    include: ['test/unit/**/*.test.ts'],
+    coverage: {
+      include: ['src/**'],
+    },
+  },
+});