Update KumaScript, PRs 178, 180, and 181
Update KumaScript, PRs 178, 180, and 181

- mozilla/kumascript#178 - AddonSidebar: Add intro and dev tools
- mozilla/kumascript#180 - WebExtBrowserCompat: Handle manifest.json
- mozilla/kumascript#181 - SpecName: Link Service Workers to ED not WD

a2sheppy/kuma,Elchi3/kuma,jwhitlock/kuma,escattone/kuma,a2sheppy/kuma,SphinxKnight/kuma,SphinxKnight/kuma,mozilla/kuma,escattone/kuma,Elchi3/kuma,Elchi3/kuma,SphinxKnight/kuma,a2sheppy/kuma,mozilla/kuma,Elchi3/kuma,a2sheppy/kuma,Elchi3/kuma,SphinxKnight/kuma,jwhitlock/kuma,jwhitlock/kuma,mozilla/kuma,SphinxKnight/kuma,escattone/kuma,jwhitlock/kuma,jwhitlock/kuma,a2sheppy/kuma,mozilla/kuma,SphinxKnight/kuma,mozilla/kuma