fix(jspm): fix jspm version to prevent build fail
fix(jspm): fix jspm version to prevent build fail

Linked to https://github.com/jspm/jspm-cli/issues/1411

davinkevin/Podcast-Server,davinkevin/Podcast-Server,davinkevin/Podcast-Server,davinkevin/Podcast-Server,davinkevin/Podcast-Server