8.0.0

Relay Compiler no longer relies on the graphql-js schema representation. And consumes only SDL file that represents the schema. This means that all custom implementations relay compiler runners that were depended on the specifics of the graphql-js may not work as expected. Specifically, custom Enum values are no longer available in the relay-compiler - as they cannot be expressed via SDL. Also, custom function parseValue, parseLiteral and serialize that can be defined for a graphql type via graphql-js primitives are not accessible in the relay compiler: this may break serialization of custom scalars. 860c23c
Babel plugin no longer produces thunks: 490c89d
Mutations are committed to unique root ids #2349. In mutation updaters, fields in the mutation will no longer be available in the store root returned from store.getRoot. Usages like store.getRoot().getLinkedRecord('create_comment_mutation') will break.
Removed internally unused RelayRecordSourceProxy::commitPayload(). Note that this method was not part of the public interface.
Signature of RelayStore.retain() changed to directly accept an OperationDescriptor. An operation descriptor to pass to RelayStore.retain()can be constructed usingcreateOperationDescriptoravailable inrelay-runtime`.

Allow language plugin to add schema extensions. #2935
In relay-compiler we added support for variables in complex objects and arrays: 5da3be0
isClientID helper is available to use in relay-runtime dac614c

Remove the clientMutationId requirement by creating a new root id for each executed mutation: #2349
validateMutation correctly handles lists of scalar fields in the optimistic payloads: 56795ba
DissalowIDAsAlias this validation had a bug, there it wasn't traversing LinkedFields, hence wasn't reporting violations in their selections. c4547f9
RelayModernFragmentSpecResolver only holds on to fragment references as opposed to all props passed to product code to reduce amount of leaked memory when rendering in React concurrent mode.
Fixed detecting whether the execution environment is a server: #2960

Relay codebase is using explicit inexact objects: 4e2cc2f
Added an options property on IEnvironment for attaching extra information to the environment instance
Updated docs to consider Relay server specifications GraphQL best practices and not purely a Relay spec: #2603
https://relay.dev has a new landing page redesign: #2953

Data Invalidation: Added new Data Invalidation primitives to allow marking data in the Relay Store as stale. When data is marked as stale, queries that reference that data will also be stale; stale queries will indicate to Relay that they need to be refetched the next time they are evaluated.
Deprecate LazyLoadEntryPointContainer => LazyLoadEntryPointContainer_DEPRECATED: 08bde91
Removed Unused types from RelayStoreTypes 76354e9
usePreloadedQuery now takes an unstable UNSTABLE_renderPolicy like useLazyLoadQuery: fc1b88b
useMutation Hook was added: 96d9703
Export a JSResource Flow interface from Relay.
Fixed subscribing to plural fragments with missing data when using useFragment.

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