fix(graphql_flutter): uses the last graphql package

Because graphql >=5.2.0-beta.2 <5.2.0-beta.3 requires SDK version >=2.15.0 <=3.0.0 and graphql >=5.2.0-beta.3 depends on
  gql_exec ^1.0.0, graphql >=5.2.0-beta.2 requires gql_exec ^1.0.0.
And because graphql_flutter >=5.0.0-nullsafety.5 <5.0.1-beta.2 depends on gql_exec ^0.3.0 and graphql_flutter
  >=5.0.0-nullsafety.5 <5.0.0 depends on graphql ^5.0.0-nullsafety.5, graphql_flutter >=5.0.0-nullsafety.5 <5.0.0 requires
  graphql >=5.0.0-nullsafety.5 <5.2.0-beta.2.
And because graphql_flutter >=5.1.1-beta.5 <5.2.0-beta.2 depends on connectivity_plus ^3.0.0 and graphql_flutter
  >=5.0.1-beta.1 <5.1.1-beta.5 depends on connectivity_plus ^2.0.3, graphql_flutter >=5.0.0-nullsafety.5 <5.0.0 or
  >=5.0.1-beta.1 <5.2.0-beta.2 requires graphql >=5.0.0-nullsafety.5 <5.2.0-beta.2 or connectivity_plus ^2.0.3 or ^3.0.0.
And because graphql_flutter >=5.0.0 <5.0.1-beta.1 depends on connectivity_plus ^1.0.1 and graphql_flutter >=0.8.0
  <5.0.0-beta.1 doesn't support null safety, graphql_flutter >=0.8.0 <5.0.0-beta.1 or >=5.0.0-nullsafety.5 <5.2.0-beta.2
  requires graphql >=5.0.0-nullsafety.5 <5.2.0-beta.2 or connectivity_plus ^1.0.1 or ^2.0.3 or ^3.0.0.
And because graphql_flutter >=0.4.0 <0.8.0 depends on http ^0.11.0 and graphql_flutter <0.4.0 doesn't support null safety,
  graphql_flutter <5.0.0-beta.1 or >=5.0.0-nullsafety.5 <5.2.0-beta.2 requires graphql >=5.0.0-nullsafety.5 <5.2.0-beta.2 or
  connectivity_plus ^1.0.1 or ^2.0.3 or ^3.0.0 or http ^0.11.0.
And because graphql_flutter >=5.2.0-beta.6 depends on connectivity_plus ^5.0.0 and graphql_flutter >=5.2.0-beta.4
  <5.2.0-beta.6 depends on connectivity_plus ^4.0.0, graphql_flutter <5.0.0-beta.1 or >=5.0.0-nullsafety.5 <5.2.0-beta.2 or
  >=5.2.0-beta.4 requires graphql >=5.0.0-nullsafety.5 <5.2.0-beta.2 or connectivity_plus ^1.0.1 or ^2.0.3 or ^3.0.0 or ^4.0.0
  or ^5.0.0 or http ^0.11.0.

Signed-off-by: Vincenzo Palazzo <[email protected]>

Author: vincenzopalazzo

packages/graphql_flutter/pubspec.yaml

@@ -8,7 +8,7 @@ issue_tracker: https://github.com/zino-hofmann/graphql-flutter/issues
 # publish_to: 'none'
 
 dependencies:
-  graphql: ^5.2.0-beta.4
+  graphql: ^5.2.0-beta.8
   gql_exec: ^1.0.0
   flutter:
     sdk: flutter