add scheduled workflow runs

.github/workflows/static.yml

@@ -1,6 +1,10 @@
 name: Static Analysis
 
-on: ['push', 'pull_request']
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * *'
 
 jobs:
   static:

.github/workflows/tests.yml

@@ -1,6 +1,11 @@
 name: Tests
 
-on: ['push', 'pull_request']
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 0 * * *'
+
 
 jobs:
   ci: