Added timeseries to dataframes that return a date

[bdaniels22]

Feels like this would easier to use with libraries like yfinance that return a dataframe with a timeseries. Made it so that wallstreetbets, congressional trading, lobbying, and wikipedia return a dataframe with an index that is a timeseries rather than an integer.

Done by using a simply if statement:

`if len(ticker) > 0:
     # converts index of pandas dataframe to Date time index rather than a tuple
            
     df["Date"] = pd.to_datetime(df["Date"])
            
     df = df.set_index("Date")`

[ckardatzke]

Good idea, thanks.