improve install

src/package-cache.ts

@@ -0,0 +1,14 @@
+import * as core from '@actions/core';
+import { exec } from '@actions/exec';
+import * as io from '@actions/io';
+import * as toolCache from '@actions/tool-cache';
+import * as cache from '@actions/cache';
+import * as os from 'os';
+import * as fs from 'fs';
+import * as path from 'path';
+
+export async function loadPackageCache(): Promise<void> {
+}
+
+export async function savePackageCache(): Promise<void> {
+}