• performance - Improve performance of code action requests. See #3845.
• performance - Improve performance of all language server requests that resolve a document URI. See JLS#3313.
• enhancement - Code action for unused pattern variable, lambda parameter, etc. and the corresponding clean up. See #3856, #3864.
• enhancement - Add setting to control inclusion of declarations in reference search. See #3850.
• bug fix - Mapstruct implementation class not generated. See #3836.
• bug fix - Open more requested system packages for tests with javac support. See #3847.
• bug fix - Fix some typos in documentation. See #3863
• build - Add Maven (-U) flag for updating artifacts from snapshot repositories. See #3848.