title: Flutter firebase version solving failed in flutter 2.8.1
body: <p>Because firebase_auth 0.16.0 depends on firebase_auth_web ^0.1.1 which depends on http_parser ^3.1.3, firebase_auth 0.16.0 requires http_parser ^3.1.3.
  And because flutter_paystack &gt;=1.0.5+1 depends on http ^0.13.1 which depends on http_parser ^4.0.0, firebase_auth 0.16.0 is incompatible with flutter_paystack &gt;=1.0.5+1.
  So, because flutter_sell_app depends on both firebase_auth 0.16.0 and flutter_paystack ^1.0.5+1, version solving failed.</p>
  <p>My pubspec.yaml</p>
  <pre><code>  cupertino_icons: ^1.0.0
    country_list_pick: ^1.0.1+2
    bottom_navy_bar: ^5.4.0
    cached_network_image: ^2.4.1
    carousel_slider: ^3.0.0
    flutter_html: 0.11.1
    flutter_rating_bar: ^3.2.0+1
    another_flushbar: ^1.10.10
    image_picker:
    shared_preferences: ^0.5.4+6
    carousel_pro: ^1.0.0
    flutter_staggered_animations: ^1.0.0
    flutter_credit_card: ^0.1.3
    mask_text_input_formatter: ^1.0.5
    progress_dialog: ^1.2.1
    rxdart: ^0.25.0
    # stripe_payment: ^1.1.4
    # flutter_facebook_login: ^3.0.0
    google_sign_in: ^4.5.1
    multi_image_picker: ^4.8.0
    flutter_absolute_path: 
      git:
        url: https://github.com/canewsin/flutter_absolute_path.git
    #path_provider: ^2.0.1
    fluttertoast: ^7.1.8
    flutter_staggered_grid_view: ^0.3.3
    transparent_image: ^1.0.0
    google_fonts:
    webview_flutter: ^2.0.2
    toast: ^0.1.5
    cloud_firestore: any
    firebase_auth: 0.16.0
    firebase_database: ^3.0.7
    firebase_storage: ^3.1.3
    firebase_messaging: 6.0.13
    photo_view: ^0.9.2
    place_picker:
    geolocator: ^5.1.5
    google_maps_flutter:
    permission_handler:
    timeago: ^2.0.26
    flutter_paystack: ^1.0.5+1
    sign_in_with_apple: ^3.0.0
    flutter_image_compress: ^1.0.0
    flutter_countdown_timer: ^4.1.0
    dio:
    flutter_datetime_picker: ^1.5.1
    maps_launcher: ^2.0.1
    readmore: ^2.1.0
    like_button: ^2.0.2
    clay_containers: ^0.3.2
    country_code_picker: ^2.0.2
  </code></pre>