Allow datetime values to be subtracted from a Series to create a TimedeltaSeries

[gandhis1]

• Tests added: Please use assert_type() to assert the type of any return value

In [2]: import pandas as pd
   ...: from datetime import datetime
   ...: s = pd.Series(pd.date_range("1/1/2020", "2/1/2020"))
   ...: s - datetime.now()
Out[2]: 
0    -995 days +02:03:18.373842
1    -994 days +02:03:18.373842
2    -993 days +02:03:18.373842
3    -992 days +02:03:18.373842
4    -991 days +02:03:18.373842
5    -990 days +02:03:18.373842
6    -989 days +02:03:18.373842
7    -988 days +02:03:18.373842
8    -987 days +02:03:18.373842
9    -986 days +02:03:18.373842
10   -985 days +02:03:18.373842
11   -984 days +02:03:18.373842
12   -983 days +02:03:18.373842
13   -982 days +02:03:18.373842
14   -981 days +02:03:18.373842
15   -980 days +02:03:18.373842
16   -979 days +02:03:18.373842
17   -978 days +02:03:18.373842
18   -977 days +02:03:18.373842
19   -976 days +02:03:18.373842
20   -975 days +02:03:18.373842
21   -974 days +02:03:18.373842
22   -973 days +02:03:18.373842
23   -972 days +02:03:18.373842
24   -971 days +02:03:18.373842
25   -970 days +02:03:18.373842
26   -969 days +02:03:18.373842
27   -968 days +02:03:18.373842
28   -967 days +02:03:18.373842
29   -966 days +02:03:18.373842
30   -965 days +02:03:18.373842
31   -964 days +02:03:18.373842
dtype: timedelta64[ns]

[Dr-Irv]

thanks @gandhis1