STP-163: Expand animation api to include a function at `propName` level to override animation defaults, lower level rules.
STP-163: Expand animation api to include a function at `propName` level to override animation defaults, lower level rules.

ie,
```
animate={{
  fill: () => ({ events: ..., timing: ..., fill: ... }),
}}
```

ihmeuw/beaut,ihmeuw/ihme-ui,ihmeuw/beaut,ihmeuw/ihme-ui,ihmeuw/ihme-ui,ihmeuw/beaut