file_extractor 2.0.0-rc1

Changes since https://www.drupal.org/project/search_api_attachments/releases/8.x-1.0-b...

• #3126845 by Grimreaper: Fix Pareview.sh
• #3126845 by Grimreaper: Update README.txt
• #3126845 by Grimreaper: Views filter plugin put in Search API directly
• #3126845 by Grimreaper: Add settings to enable cache feature.
• #3126845 by Grimreaper: Refactor cache handling.
• #3126845 by Grimreaper: Change excluded_private settings in exclude_private
• #3126845 by Grimreaper: Remove Search API plugin and queue. Get the exclude search in attachments views filter back.
• #3126845 by Grimreaper: Use key value system as cache (already existing feature).
• #3126845 by Grimreaper: Update extracted text field formatter.
• #3126845 by Grimreaper: Add global extraction settings.
  - prepare code to re-use extraction settings to allow overrides while avoiding code duplication
  - simplify checks on file.
  - convert hook into event
  - put validation logic into ExtractorManager
• #3126845 by Grimreaper: Move test extraction logic into the extractor plugins directly.
• #3126845 by Grimreaper: Init ExtractorManager service and use it for the computed field on File entity.
• #3126845 by Grimreaper: Rework settings form.
• #3126845 by Grimreaper: Add declare(strict_types = 1); on all PHP files.
• #3126845 by Grimreaper: Rework extractor plugin system:
  - uniformize extractors
  - prepare extractors to properly use the PluginFormInterface
  - better validation in extractor and better error handling
  - "UTF-8 multibyte characters will be stripped by escapeshellargs() for..." ignored or skipped in some extractors
  - refactoring to avoid duplicated code
  - remove useless injected service
  - fix config schema
• #3126845 by Grimreaper: Global renaming of the module. Start some cleanup.
• #3008580 by Grimreaper: Impossible to index attachment in nested entity reference