v0.11.0 breaking change

Breaking change on summon.config.yaml

This release brings a breaking change on the handle format of exec handles. The handles are now arrays of params. Prior to this they were of string format, this has proved difficult to use when passing multiple args to the invoker.

Before:

...
exec: 
  bash:
    echo: echo david

After (notice the array):

...
exec:
  bash:
    echo: [echo, david]