CI: add cron and workflow dispatch (#119)

* CI: default branch has been renamed

* CI: adding cron

* CI: adding workflow_dispatch

---------

Co-authored-by: Angus Hollands <goosey15@gmail.com>

Author: bsipocz

.github/workflows/tests.yml

@@ -2,10 +2,14 @@ name: continuous-integration
 
 on:
   push:
-    branches: [master]
+    branches:
+    - main
     tags:
-      - 'v*'
+    - '*'
   pull_request:
+  schedule:
+    - cron:  '0 5 * * 1'
+  workflow_dispatch:
 
 
 jobs: