Get the upcoming all calendar_events instead of get every calendar by pass the ticker.

**Is your feature request related to a problem? Please describe.**

Now, yahooquery must pass a ticker to get its calendar event.

**Describe the solution you'd like**

Just like this page, get all the upcoming events for all ticker.

https://finance.yahoo.com/calendar/earnings/?guce_referrer=aHR0cHM6Ly93d3cuZ29vZ2xlLmNvbS8&guce_referrer_sig=AQAAANrVegTbCvpHLzAyQYlKHsZL5YjXRqo6TfAfCH_ZbfFcIz5bWKM83dfv2Lmzk6Q5pFEcUDKVVi8fUnzs7i0KpNJhl9PqiSqQaoGK7A63alknBzY2RmZqQwghlWexKrTSkdjhad1VvimJ24lJ_iHsLyzSsbjjQYaPatA6DwMICOxN&guccounter=2

**Describe alternatives you've considered**

loop all ticker and date to filter which ticker has the event. But this way is so slow and waste time.