Use GitHub releases to download Go versions. (#58)

action.yml

@@ -7,6 +7,9 @@ inputs:
   stable:
     description: 'Whether to download only stable versions'
     default: 'true'
+  token:
+    description: Used to pull node distributions from go-versions.  Since there's a default, this is typically not supplied by the user.
+    default: ${{ github.token }}
 runs:
   using: 'node12'
   main: 'dist/index.js'