Statamic 5 Support

[duncanmcclean]

This pull request makes the Eloquent Driver compatible with Statamic 5, in addition to refreshing the docs & various other improvements.

Changes

• Refreshed the docs ✍️
  • https://github.com/statamic/eloquent-driver/pull/254
• Splits form & form submission repositories, following changes in Core.

  • 177

• Splits up the publish tags, so the "entries" migrations can be published without publishing the "collection" migrations.
  • https://github.com/statamic/eloquent-driver/pull/266
• Drivers in the config are now opt-in, rather than being opt-out.
  • https://github.com/statamic/eloquent-driver/pull/268
• Dropped the status column on entries

  • 228

• Ensures the blink cache is cleared when saving assets
  • https://github.com/statamic/eloquent-driver/pull/271
• Various improvements to the importer commands
  • https://github.com/statamic/eloquent-driver/pull/269
• Support for storing Live Preview tokens in the database
  • https://github.com/statamic/eloquent-driver/pull/277
• Fixed issues querying entry statuses after changes in Core
  • https://github.com/statamic/eloquent-driver/pull/279

To Do

• [x] After pending PRs have been merged, mark this PR ready for review.
• [x] After v5 has been tagged, change minimum statamic/cms version to ^5.0