Use network_cellular icon (#170)

Author: Jupi007

lib/view/pages/connections/connections_page.dart

@@ -54,7 +54,7 @@ class _ConnectionsPageState extends State<ConnectionsPage>
                     icon: Icon(YaruIcons.network_wired),
                     child: Text("Ethernet")),
                 Tab(
-                    icon: Icon(YaruIcons.call_incoming),
+                    icon: Icon(YaruIcons.network_cellular),
                     child: Text("Cellular")),
               ]),
         ),

pubspec.yaml

@@ -35,7 +35,7 @@ dependencies:
     git:
       url: https://github.com/canonical/upower.dart
   yaru: ^0.1.7
-  yaru_icons: ^0.0.6
+  yaru_icons: ^0.0.7
   yaru_widgets:
     git:
       url: https://github.com/ubuntu/yaru_widgets.dart