Elex Test Calendar Bot: Filter data

[abidishajia]

The bot requests the AP API to get the test calendar data. Since there is no way to filter the data directly from the API, we have to create a function that filters out the old data.

• Create a helpers directory.
• Create a filter function that checks today's date and filters out old data.
• Add it to the getElexTestData.js file here
• Run it to make sure correct data is added to the sheets.