35636-Migrate to spreadsheet
1. Why is this change necessary?
So export/import works under PHP 7.3
2. What does this change do, exactly?
It migrates our PhpExcel service to phpspreadsheet
3. Describe each step to reproduce the issue or behaviour.
- Install this MR and a plugin that has an import/export based on it (E.g StoreLocator)
- Try to import a file and check for any issues
- Try to export a file and check for any issues
4. Please link to the relevant issues (if any).
https://redmine.netinventors.de/issues/35636
5. Checklist
-
I have updated the plugin version and changelog -
I have set the required labels -
I can confirm the code style fits our requirements -
I can confirm no debug output is generated anywhere -
I have changed the required NetiFoundation-version to the latest available version