4.0.0-alpha.16

Major Changes

• [client] generate enums in UPPERCASE and fix kotlinx request serialization (#1087) @dariuszkuc
• Do not wrap exceptions twice (#1083) @smyrick
• cleanup usage of GraphQL request and response objects (#1077) @dariuszkuc

Patch Changes

• Add data loader registry to subscription execution (#1085) @smyrick

Non-version Changes

• Update the docs on the exception handler (#1086) @smyrick
• Bump ssri from 8.0.0 to 8.0.1 in /examples/federation/gateway (#1081) @dependabot
• [docs] update serialization docs to use introspection (#1078) @dariuszkuc
• Add documentation for subscription hooks (#1072) @smyrick