Update Node.js to v16

CountBleck · CountBleck · commit 72e194aa4fcc · 2022-12-04T02:32:36.000-08:00
CI now complains about how Node.js v12 actions have been deprecated. Fixes #13.
diff --git a/action.yml b/action.yml
@@ -12,5 +12,5 @@ branding:
   icon: download
   color: green
 runs:
-  using: node12
+  using: node16
   main: index.js
