@actions/cache: convert to an ESM module (#2275)

* `@actions/cache`: convert to an ESM module

* Update the fixture to ESM syntax

* Update the cache workflows

* Bump `@actions/glob` to `0.6.1`

* Fix awaiting in the cache unit tests

* Fix a type issues in contracts

* Export the `DownloadOptions`/`UploadOptions` like before

* More cache test fixes

* Make the cache units tests better

* Add some more logging

* Add retries to restore-cache.mjs

tsconfig.json

@@ -4,6 +4,8 @@
     "baseUrl": "./",
     "outDir": "./lib",
     "rootDir": "./src",
+    "module": "node16",
+    "moduleResolution": "node16",
     "lib": [
       "es6",
       "dom"