4.4.6

Maintenance Release: Supports injecting request metadata from plugins into provider tests

• 461b9e3 - feat: RequestData metadata needs to be a mutable Map
• 49f4d90 - feat: Support modifying the request metadata in the provider test before being sent to the plugin
• 21ada1b - fix: support metadata mismatches from results from plugins
• 1bee97d - feat: add support for NotEmpty matcher in V4 DSL
• 4ac9dcd - chore: Upgrade plugin driver to 0.3.1
• e71eb4d - feat: Upgrade plugin driver to 0.3.0 (supports message metadata)