• performance - Clean up invalid projects during initialization to prevent build cycles. See #3639.
• enhancement - Expose source actions via. the code action (light bulb) menu. See #3714.
• enhancement - Use java.diagnostic.filter to exclude files from the "Problems" tab. See #2150.
• enhancement - Clear out-of-date files under extension's global storage. See #2597.
• enhancement - Add support for callees based on implementors for call hierarchy. See JLS#2780.
• bug fix - Links to classes do not appear in completion documentation. See #3697.
• bug fix - Add tag property to better track kinds of stacktrace errors of interest. See #3720.
• dependencies - Target platform update resulting in loss of support for Java versions older than 1.8. See JLS#3227.