Missing intellisense

Hi,

If this is some sort of misconfiguration on my end, please tell me to go away and fix my setup, but really, it's only happening with troposphere.

I use VS Code on Ubuntu and over the years I have gotten used to tools helping me to write code. Unfortunately, troposphere seems to be making my job really, really difficult.

```
from troposphere import Template as t, ec2
template = t()
base_vpc = ec2.VPC("vpc")
```

If I now start typing `base_vpc.` I would expect to be able to see properties like `CidrBlock` be available to me via intellisense / tab completion, but nada, it's not.

Similarly, when typing the properties inline to the object, I'd expect to see more than just `template`, but the actual properties, again, something like `CidrBlock`.

I either have to move my mouse now and hover over `VPC` with a pressed `Ctrl` key


or actually look at the source by clicking onto the class.

This **feels** super unproductive.

If someone could please let me know what I have to do to get proper intellisense for troposphere, that'd be great.

Thanks,
David