Upgrade to open-on-github@0.20.0

package.json

@@ -89,6 +89,7 @@
     "link": "0.17.0",
     "markdown-preview": "0.30.0",
     "metrics": "0.26.0",
+    "open-on-github": "0.20.0",
     "package-generator": "0.26.0",
     "release-notes": "0.20.0",
     "settings-view": "0.74.0",
@@ -100,7 +101,6 @@
     "tabs": "0.19.0",
     "terminal": "0.27.0",
     "timecop": "0.13.0",
-    "to-the-hubs": "0.19.0",
     "tree-view": "0.69.0",
     "update-package-dependencies": "0.3.0",
     "visual-bell": "0.7.0",