Merge pull request #24 from kmillikin/master

Use analyzer version >= 0.22.4.
Add support for continue to a label.

Also, move the handling of break targets for labeled loop switch
statements to the statements themselves instead of the labeled statement
enclosing them.
Merge remote-tracking branch 'upstream/master'
Add support for cascades.

Much like declarations, if a cascade section immediately to the right
contains an await, all the accumulated cascades must be residualized.