Add node's caching implementation (#2)

* first iteration for implementation of caching

* add logs

* add debug line

* fix build command

* fix path

* add possible post-if

* remove braces

* test new action post-if variant

* work on built-in caching

* remove post-if

* pass version

* work on yarn support

* fix return value

* change names and remove logs

* worked on resolving comments

* check post-if for null

* add success() condition

* remove primary key field

* work on resolving comments

* remove logs

* resolving comments

* resolving comments

* resolving comments

* resolving comments

* fix getpackageManagerVersion

* run clean for unstaged changes

* fix falling version tests

* work on resolving comments

* resolving comments

* fix comment

* resolve comments

* Add tests to cover node's caching (#3)

* add tests to cover node's caching

* work on fixing tests

* fix e2e tests

* rebuild and fix test

* fixing tests

* change name of describes, it and fix test

* add names for jobs

* fix issue

package.json

@@ -5,7 +5,7 @@
   "description": "setup node action",
   "main": "lib/setup-node.js",
   "scripts": {
-    "build": "tsc && ncc build",
+    "build": "ncc build -o dist/setup src/setup-node.ts && ncc build -o dist/cache-save src/cache-save.ts",
     "format": "prettier --write **/*.ts",
     "format-check": "prettier --check **/*.ts",
     "test": "jest",
@@ -23,9 +23,11 @@
   "author": "GitHub",
   "license": "MIT",
   "dependencies": {
+    "@actions/cache": "^1.0.7",
     "@actions/core": "^1.2.6",
-    "@actions/exec": "^1.0.3",
+    "@actions/exec": "^1.1.0",
     "@actions/github": "^1.1.0",
+    "@actions/glob": "^0.2.0",
     "@actions/http-client": "^1.0.6",
     "@actions/io": "^1.0.2",
     "@actions/tool-cache": "^1.5.4",