Merge branch '3450453-google-structured-data' into '1.0.x'

...g/install/schemadotorg.schemadotorg_mapping_type.node.yml

config/install/schemadotorg.settings.yml

docs/DECISIONS.md

...fig/install/schemadotorg_additional_mappings.settings.yml

...al_mappings/src/SchemaDotOrgAdditionalMappingsManager.php

...eld/config/install/schemadotorg_custom_field.settings.yml

...madotorg_existing_values_autocomplete_widget.settings.yml

...roup/config/install/schemadotorg_field_group.settings.yml

..._group/src/SchemaDotOrgFieldGroupEntityDisplayBuilder.php

...dotorg_jsonld/src/Form/SchemaDotOrgJsonLdSettingsForm.php

...les/schemadotorg_jsonld/src/SchemaDotOrgJsonLdBuilder.php

.../tests/src/Kernel/SchemaDotOrgJsonLdBuilderKernelTest.php

..._set/config/install/schemadotorg_mapping_set.settings.yml

..._options/config/install/schemadotorg_options.settings.yml

.../snapshot/core.entity_form_display.node.event.default.yml

...snapshot/core.entity_form_display.node.person.default.yml

.../snapshot/core.entity_view_display.node.event.default.yml

...snapshot/core.entity_view_display.node.person.default.yml

schemadotorg.schemadotorg.inc