v0.8.7 Release
Tracing Support
bd283b3 If noop tracer then do not return a new context with span (#774)
f7e269c Also read span context from internal context key (#767)
0356cc6 Add context propagation on child workflow and continue as new (#769)
Session Support
d7f3686 Fix worker option typo (#772)
1a633af Session: inline short timeout completion activity (#770)
0061628 Cancel session activities when session failed or completed (#768)
Bug fixes
19583ac Wait for local activity while holding workflow context lock (#760)
Miscellaneous
41a5263 Make test suite respond with a typed error for unknown workflow execution (#758)