Doesn't support `var` in newer versions of Java

When the method `Fixture.from(clazz).gimme(label)` is called you have to implicit declare the type of your object.

Doesnt' work:
```
var client = Fixture.from(Client.class).gimme("valid");
```

Work:
```
Client client = Fixture.from(Client.class).gimme("valid");
```
 
