Options provided before all command names fails execution

When options are included as arguments between sub-commands execution will fail with an ambiguous error.

E.g.
```
executable command --option-one value subcommand
```

The only means in which to produce a successful execution is to postfix all options - at which point it is processed successfully.

E.g.
```
executable command subcommand --option-one value
```

Library Version: 2.0.0-beta1.20574.7
Framework: dotnet-core 3.1