v2.8.7

Cthulhu v2.8.7

Diff since v2.8.6

Closed issues:

• Type of variable is incorrectly annotated as Union{} (#403)

Merged pull requests:

• Support TypeVars with abstract upper bounds (#405) (@timholy)
• Pick correct slottype entry (#406) (@timholy)
• Clarify menu options for ascend (#407) (@timholy)