Use posix archive format (#533)

* Use posix archive format

Signed-off-by: Sora Morimoto <sora@morimoto.io>

* Update package.json and RELEASES.md

Signed-off-by: Sora Morimoto <sora@morimoto.io>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@actions/cache",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "preview": true,
   "description": "Actions cache lib",
   "keywords": [