[jss-plugin-expand] Border not expanding correctly

__Expected behavior:__

As per https://cssinjs.org/jss-plugin-expand?v=v10.0.0-alpha.9

```
container: {
border: {
color: 'black',
width: 1,
style: 'solid'
}
}
```
should compile to
```
.container {
border: 1px solid black;
}
```

__Describe the bug:__

It compiles to
```
.container {
border-width: 1px;
border-style: solid;
border-color: black;
}
```

__Codesandbox link:__
https://codesandbox.io/s/jss-plugin-expand-issue-ww682

__Versions (please complete the following information):__
- jss: 10.1.1
- Browser [e.g. chrome, safari]: Chrome
- OS [e.g. Windows, macOS]: Linux
Feel free to add any additional versions which you may think are relevant to the bug.

This was briefly mentioned in #1023

Edit: Same issue with font properties

Start at the jss-plugin-expand implementation and reproduce the issue using the linked CodeSandbox. Compare the generated CSS with the documented border shorthand behavior, including the related font-property case mentioned in the edit. Done means the expanded declarations produce the expected output without regressing existing behavior.

Written by the indexing model from the issue text.