Bump bos version to one that test SIGNEXTEND

and version bump to pre-release

Signed-off-by: Silas Davis <silas@monax.io>

project/history.go

@@ -11,6 +11,8 @@ import (
 // To cut a new release add a release to the front of this slice then run the
 // release tagging script: ./scripts/tag_release.sh
 var History relic.ImmutableHistory = relic.NewHistory("Hyperledger Burrow").MustDeclareReleases(
+	"0.18.0",
+	`Prerelease`,
 	"0.17.1",
 	`Minor tweaks to docker build file`,
 

scripts/deps/bos.sh

 #!/usr/bin/env bash
 
 # The git revision of Bosmarmot/bos we will build and install into ./bin/ for integration tests
-echo "37de30c0d29ddc6960a3aa285607fe5939071a78"
+echo "d12b45c733a02c0c6dd70fc7e0563e5e3ef4a68c"
\ No newline at end of file