Explicitly import crypto (#1842)

* Explicitly import `crypto`

* Add release notes for 1.11.1

* Fix crypto mock in test

* Fix `crypto` mock

* Lint

src/tool-cache.ts

@@ -1,5 +1,6 @@
 import * as core from '@actions/core'
 import * as io from '@actions/io'
+import * as crypto from 'crypto'
 import * as fs from 'fs'
 import * as mm from './manifest'
 import * as os from 'os'