feat(series): #1098 arithmetic truediv

[cmp0xff]

• Addresses Addition of a Series[int] with a complex returns Series[unknown] #1098 and continues the programme proposed in feat(series): #1098 arithmetic addition #1275
• Tests added: Please use assert_type() to assert the type of any return value

[Dr-Irv]

You have the same issue here as in #1275 with the reverse operators. So my comments there apply here.

Also, I think it would be worthwhile to reorganize the declarations of the operators in series.pyi. So you would have them in this order

• __truediv__()
• truediv()
• div()
• __rtruediv__()
• rtruediv()
• rdiv()

In #1275 you could do something similar for the addition operators. This will keep things better organized and together.

[Dr-Irv]

This all looks good, but can you reorganize the operations to keep things together, in this order:

1. __truediv__()
2. truediv()
3. __rtruediv__()
4. rtruediv()

Also, you don't need to do the overloads for div and rdiv. You can just do

div = truediv
rdiv = rtruediv

[Dr-Irv]

thanks @cmp0xff