4.0.0-alpha.13

Major Changes

• [client] Batch query support (#1030) @dariuszkuc

Minor Changes

• Generate DataLoaders on every request (#1040) @smyrick
• Simplify setup of dataloaders in spring server (#1031) @jarlehansen

Patch Changes

• Update graphql-java 16.2 (#1035) @smyrick
• [plugin] updates to Gradle plugin tasks configuration avoidance (#1028) @dariuszkuc

Non-version Changes

• [docs] updating invalid refresh link in index.html (#1044) @dariuszkuc
• Rename older docs version (#1042) @smyrick
• Delete older alpha docs (#1041) @smyrick
• Add tests to show use of completable future wrappers (#1032) @smyrick