Some bug fixes

fix: Allow LTI fallback on ExternalIdTypes for older edx-platform versions
fix: Many retries when an LRS returns a 409 erro

OARS v1 work and performance improvement

• Use proper externalId types XAPI and CALIPER instead of LTI
• Make user identifier in xAPI events configurable
• Switch from edx-sphinx-theme to sphinx-book-theme since the former is deprecated
• Make id of xAPI statements idempotent
• Check if there are any active backends before transforming

Added video interaction events and transformer-version

• Rename toggle_warnings to toggle_warning for consistency with setting_warning.
• Add session id to all events
• Add support for video interaction events.
• Replace eventVersion with transformer-version to include semantic version of event-routing-backend package.

Added `video_complete` event to xAPI backend and fixed broken links in documentation

Added video_complete event to xAPI backend and fixed broken links in documentation

v5.2.0

What's Changed

• [ERTE-111] feat: Added transformers for edx.course.grade.now_passed and edx.course.grade.now_failed by @rehanedly in #172
• Python Requirements Update by @edx-requirements-bot in #175
• Python Requirements Update by @edx-requirements-bot in #176
• Python Requirements Update by @edx-requirements-bot in #177
• Python Requirements Update by @edx-requirements-bot in #182
• Python Requirements Update by @edx-requirements-bot in #183
• refactor: Updated 'upgrade requirements' workflow to use reusable workflows by @edx-requirements-bot in #174
• Python Requirements Update by @edx-requirements-bot in #184
• Python Requirements Update by @edx-requirements-bot in #185
• Python Requirements Update by @edx-requirements-bot in #187
• chore: Post Django32 Cleanup by @edx-requirements-bot in #186

Full Changelog: 5.1.0...v5.2.0

Refined Caliper Transformers

Refined Caliper Transformers
Added version field to xAPI transformers
Added video completion event support

Refined xAPI Transformers and Simplified Router Configuration

xAPI Transformers are refined to have proper id for actors
RouterConfiguration has separate fields for auth scheme, username and password.
Improved documentation and added event mappings as RST files
Improved logging

Move to original JSONField library.

Move from jsonfield2 to jsonfield

Added support for Django 3.0, 3.1 and 3.2

Added support for the following Django versions:

• 3.0
• 3.1
• 3.2

4.0.1: Merge pull request #42 from edx/aed/silence

Change a noisy INFO log message in TransformerRegistry.register() to DEBUG and fix two logging typos