Like any large suite of applications, Open edX software (my day job) depends on a number of underpinnings: Django, Python, Ubuntu, MySQL, and so on. We want to stay up-to-date on those dependencies, or at least ensure we are using supported versions of each.To help with that, I wanted to make a chart of the support windows for different versions of each dependency. I figured the simplest way to draw a chart like that was to make a spreadsheet. Google Sheets is enough for something like this, ...