Update flutter_svg version

Author: pedromassango

example/pubspec.yaml

@@ -12,7 +12,7 @@ dependencies:
   flutter:
     sdk: flutter
   flutter_icons: ^1.1.0
-  flutter_svg: 0.18.1
+  flutter_svg: 0.19.3
   graphx:
     path: ../
 dev_dependencies:
@@ -39,4 +39,4 @@ flutter:
   fonts:
     - family: pressstart
       fonts:
-        - asset: assets/fonts/pressstart.ttf
+        - asset: assets/fonts/pressstart.ttf