v0.2.0

[jasonbahl]

• chore: remove unreferenced .zip build artifact
• feat: remove a lot of logic from Collection.php that analyzes queries to generate cache keys and response headers, as this has been moved to core WPGraphQL
• feat: reference core WPGraphQL functions for storing cache maps for object caching
• chore: remove unused "use" statements in Invalidation.php
• feat: introduce new "graphql_purge" action, which can be hooked into by caching clients to purge caches by key
• chore: remove $collection->node_key() method and references to it.
• feat: add "purge("skipped:$type_name)" event when purge_nodes is called
• chore: remove model class prefixes from purge_nodes() calls
• chore: rename const WPGRAPHQL_LABS_PLUGIN_DIR to WPGRAPHQL_SMART_CACHE_PLUGIN_DIR
• chore: update tests to remove "node:" prefix from expected keys
• chore: update tests to use self::factory() instead of $this->tester->factory()
• chore: update Plugin docblock
• feat: add logic to ensure minimum version of WPGraphQL is active before executing functionality needed by it
• chore: remove filters that add model definitions to Types as that's been moved to WPGraphQL core