update sed to work on both bsd and gnu

Author: stvnjacobs

bin/deploy

@@ -62,7 +62,8 @@ echo "Creating a release branch release-${version}"
 git checkout -b "release-${version}"
 
 echo "Updating openapi.yaml with the new version number"
-sed -ie -E -- "s|version: ${version_regex}|version: ${version}|" openapi.yaml
+sed -E -i.bak "s|version: ${version_regex}|version: ${version}|" openapi.yaml \
+  && rm openapi.yaml.bak
 
 echo "Committing the version bump"
 git add openapi.yaml