CI: add monthly testing

YaLTeR · YaLTeR · commit 6d83c534df5a · 2020-04-04T13:17:43.000+03:00
diff --git a/.github/workflows/vapoursynth.yml b/.github/workflows/vapoursynth.yml
@@ -1,6 +1,10 @@
 name: vapoursynth
 
-on: [push, pull_request]
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 1 * *' # Monthly
 
 jobs:
   clippy-rustfmt:
