Automatic caching of dependencies

in a best effort manner by default
allowing to specify files to hash for computing the cache key

src/post.ts

@@ -1,8 +1,10 @@
 import * as cacheWrapper from './cache-wrapper'
+import * as cacheDependencies from './cache-dependencies'
 
 // Invoked by GitHub Actions
 export async function run(): Promise<void> {
     await cacheWrapper.cacheWrapperDist()
+    await cacheDependencies.cacheDependencies()
 }
 
 run()