Update composer.json

Please update composer.json to fix the following problem:

```
    - fsi/datagrid-bundle dev-master requires fsi/datagrid 0.9.* -> satisfiable by fsi/datagrid 0.9.2, fsi/datagrid 0.9.0, fsi/datagrid 0.9.1, fsi/datagrid 0.9.2.
    - fsi/datagrid-bundle dev-master requires fsi/datagrid 0.9.* -> satisfiable by fsi/datagrid 0.9.2, fsi/datagrid 0.9.0, fsi/datagrid 0.9.1, fsi/datagrid 0.9.2.
    - Can only install one of: fsi/datagrid dev-master, fsi/datagrid 0.9.2.
    - Can only install one of: fsi/datagrid dev-master, fsi/datagrid 0.9.0.
    - Can only install one of: fsi/datagrid dev-master, fsi/datagrid 0.9.1.
    - Can only install one of: fsi/datagrid dev-master, fsi/datagrid 0.9.2.
    - Installation request for fsi/datagrid dev-master -> satisfiable by fsi/datagrid dev-master.
    - Installation request for fsi/datagrid-bundle dev-master -> satisfiable by fsi/datagrid-bundle dev-master.
```