Use Azure storage SDK to download cache (#497)

* Adds option to download using AzCopy

* Bump version number and add release notes

* Ensure we use at least v10

* Negate env var so it disables AzCopy

* Use Azure storage SDK to download cache

* Use same level of parallelism as AzCopy

* Fix naming of variable

* React to feedback

* Bump Node types to Node 12

* Make linter happy

* Pass options into restoreCache method

* Fix tests

* Restructure files and add tests

* Add method to get the default download and upload options

* Include breaking changes in RELEASES.md

Co-authored-by: Josh Gross <joshmgross@github.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@actions/cache",
-  "version": "0.2.1",
+  "version": "1.0.0",
   "preview": true,
   "description": "Actions cache lib",
   "keywords": [
@@ -42,6 +42,7 @@
     "@actions/glob": "^0.1.0",
     "@actions/http-client": "^1.0.8",
     "@actions/io": "^1.0.1",
+    "@azure/storage-blob": "^12.1.2",
     "semver": "^6.1.0",
     "uuid": "^3.3.3"
   },