Done issues

Exception when using elasticsearch and multiple analyzers for indexed field in projection query.
HSEARCH-3978
Document the aggregation DSL in details
HSEARCH-3668
Use JDK11 by default when building Hibernate Search
HSEARCH-3929
Upgrade to Lucene 8.6.0
HSEARCH-3965
Specify defaults for index-level configuration properties at the backend level
HSEARCH-3967
Upgrade to Elasticsearch 7.8
HSEARCH-3956
Document scrolling
HSEARCH-3976
Validation failure messages should mention that they are related to Elasticsearch schema validation
HSEARCH-3960
Projectable fields in the Elasticsearch schema should have "store = false"
HSEARCH-3936
Use a single field for GeoPoint storage in Lucene
HSEARCH-3939
HibernateOrmIntegrationBooterImpl confuses the startup event for a shutdown event, and vice-versa
HSEARCH-3938
Error messages on boot/shutdown are hidden or unclear when using an EnvironmentSynchronizer
HSEARCH-3937
Upgrade to Elasticsearch 6.8 for AWS tests
HSEARCH-3951
Move the technical documentation to a separate document
HSEARCH-3954
Implement and test boosts on matchAll, matchId, boolean, nested predicates
HSEARCH-3506
Document that zero-downtime reindexing is only doable if the schema did not change (for now)
HSEARCH-3953
Ensure Hibernate Search 5 configuration files will make bootstrap fail in 6
HSEARCH-3266
Test the default sort
HSEARCH-3961
Scroll always targets all indexes
HSEARCH-3977
Stop testing Elasticsearch 6.2 in periodic CI builds
HSEARCH-3942
Document possible architectures
HSEARCH-3962
Restore the ability to configure Lucene directories on a per-index or per-shard basis
HSEARCH-3636
ClassCastException: org.hibernate.search.backend.elasticsearch.types.sort.impl.ElasticsearchGeoPointFieldSortBuilderFactory cannot be cast to org.hibernate.search.backend.elasticsearch.types.sort.impl.ElasticsearchStandardFieldSortBuilderFactory
HSEARCH-3941
Distance projection on multi-valued fields
HSEARCH-3944
Add Elasticsearch compatibility policy to the documentation and/or website
HSEARCH-3262
Document the predicate DSL in details
HSEARCH-3598
Document routing key bridges
HSEARCH-3709
Restore sort by distance on (nested) field in the Library showcase
HSEARCH-3940
Search 6 groundwork - Restore support for scrolling
HSEARCH-3323
Document the projection DSL in details
HSEARCH-3600
Document declaration of dependencies in bridges
HSEARCH-3710
Document the sort DSL in details
HSEARCH-3599
Clean up timing-related code
HSEARCH-3970
Avoid using deprecated Lucene APIs in internals
HSEARCH-2206
Document the programmatic mapping
HSEARCH-3680
Rename ObjectFieldStorage to ObjectStructure and move it to a more appropriate package
HSEARCH-3948
Allow POJO mapper implementations to pass explicit routing keys when indexing
HSEARCH-3891
Test multiple index option compatibility for spatial predicates.
HSEARCH-3593
Make re-use of predicate/sort/fieldtype easier and safer
HSEARCH-3476
Factorize tests applied to various predicates
HSEARCH-3958
Upgrade to Hibernate ORM 5.4.18.Final
HSEARCH-3957
Projection on multi-valued field values
HSEARCH-3391
Complete all missing sections of the documentation
HSEARCH-3677
Take into account how the field is being used when determining cross-index field compatibility
HSEARCH-3307
Remove the reference to SearchContext in reusable builders
HSEARCH-3946
Refactor ElasticsearchScopedIndexFieldComponent / LuceneScopedIndexFieldComponent
HSEARCH-3945
Upgrade to Elasticsearch 6.8.9
HSEARCH-3935
Build and run tests against JDK16
HSEARCH-3964
Simpler configuration when only one backend type is available
HSEARCH-3102
Remove OSGi and Wildfly support and integration tests from legacy code
HSEARCH-3949
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