Remove Node.js less than 18.19.0 support (#67)

The `npx ls-engines` command reports as below:

```
Your “engines” field allows more node versions than your dependency graph does.

┌──────────────────────────────┬──────────────────────┐
│ Conflicting dependencies (2) │ engines.node         │
├──────────────────────────────┼──────────────────────┤
│ execa                        │ ^18.19.0 || >=20.5.0 │
├──────────────────────────────┼──────────────────────┤
│ human-signals                │ >=18.18.0            │
└──────────────────────────────┴──────────────────────┘
```

Author: ybiquitous

CHANGELOG.md

@@ -2,11 +2,12 @@
 
 ## Head
 
+- Removed: Node.js less than `18.19.0` support.
 - Fixed: missing GitHub Sponsor for `funding` field in `package.json`.
 
 ## 0.4.0
 
-- Removed: Node.js less than 18.12.0 support.
+- Removed: Node.js less than `18.12.0` support.
 - Changed: bump `cosmiconfig` to v9.
 - Changed: bump `execa` to v8.
 - Changed: bump `ora` to v7.

package-lock.json

@@ -77,6 +77,6 @@
     "vitest": "^1.6.0"
   },
   "engines": {
-    "node": ">=18.12.0"
+    "node": ">=18.19.0"
   }
 }