Replace forked cache by official npm (#21)

* Replace forked cache by official npm

* Follow the same validation as @action/cache

* Remove debug log

src/constants.ts

@@ -0,0 +1,22 @@
+export enum Inputs {
+  Key = "key",
+  Path = "path",
+  RestoreKeys = "restore-keys",
+}
+
+export enum Outputs {
+  CacheHit = "cache-hit",
+}
+
+export enum State {
+  CachePrimaryKey = "CACHE_KEY",
+  CacheMatchedKey = "CACHE_RESULT",
+}
+
+export enum Events {
+  Key = "GITHUB_EVENT_NAME",
+  Push = "push",
+  PullRequest = "pull_request",
+}
+
+export const RefKey = "GITHUB_REF"