Run actions on schedule

Author: oschwald

.github/workflows/lint.yml

@@ -1,6 +1,10 @@
 name: PHP Lints
 
-on: [push, pull_request]
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '55 3 * * SUN'
 
 jobs:
   run:

.github/workflows/test.yml

@@ -1,6 +1,10 @@
 name: PHPUnit
 
-on: [push, pull_request]
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '55 3 * * SUN'
 
 jobs:
   run: