Update pubspec.yaml

The use of the outdated plugin_platform_interface package is causing inconsistencies with some packages, for example, geolocator and firebase_storage. I suggested some updates above.

@@ -7,23 +7,23 @@ description: >
 homepage: https://github.com/DavBfr/dart_pdf/tree/master/printing
 repository: https://github.com/DavBfr/dart_pdf
 issue_tracker: https://github.com/DavBfr/dart_pdf/issues
-version: 5.0.0
+version: 5.0.1
 
 environment:
   sdk: ">=2.12.0-0 <3.0.0"
   flutter: ">=1.16.0"
 
 dependencies:
-  ffi: ">=0.3.1-nullsafety.0 <2.0.0"
+  ffi: ^1.0.0
   flutter:
     sdk: flutter
   flutter_web_plugins:
     sdk: flutter
-  image: ^3.0.0-nullsafety
-  js: ^0.6.3-nullsafety
-  meta: ^1.3.0-nullsafety
+  image: ^3.0.1
+  js: ^0.6.3
+  meta: ^1.3.0
   pdf: ^3.0.0
-  plugin_platform_interface: ^1.1.0-nullsafety
+  plugin_platform_interface: ^2.0.0
 
 dev_dependencies:
   flutter_test: