v0.8.0 of network

2019-11-20T15:37:36.639505Z

0.8.0 was published on Nov 20, 2019.

Changelog excerpt:
- Added middleware! Usage example:

```
`network.settings.middleware.add( network.Middleware( onRequest: (request) => request, onResponse: (response) => response, onError: (error) => error, ) );````
- Simplify usage settings (`network.NetworkSettings()...`-> `network.settings...`)
- `NetworkSettings.{exceptionDelegate, successfulDelegate, hasSuccessfulDelegate}`marked as deprecated ann will be removed in 1.0.0
- Usage as client available!

```
`import 'package:network/network.dart'; final client = Network(); client.get(...); client.post(...); client.close();````
- Added `network.head()`method
- Added `Response.request`
- Added `PaymentRequired`& `MethodNotAllowed`http exceptions;