Upgrade to probot v9 (#144)

Author: chrisdothtml

package.json

@@ -9,15 +9,15 @@
   },
   "dependencies": {
     "node-fetch": "^2.2.0",
-    "probot": "7.5.0",
-    "probot-app-delete-merged-branch": "^1.0.1",
-    "probot-app-deploy": "^1.1.0",
-    "probot-app-label-docs-pr": "1.1.0",
-    "probot-app-merge-pr": "1.1.1",
-    "probot-app-migrations": "1.0.5",
+    "probot": "^9.2.10",
+    "probot-app-delete-merged-branch": "^1.0.2-0",
+    "probot-app-deploy": "^1.1.1-0",
+    "probot-app-label-docs-pr": "^1.1.1-0",
+    "probot-app-merge-pr": "^1.1.2-0",
+    "probot-app-migrations": "^1.0.6-0",
     "probot-app-monorepo-sync": "^0.0.1-1",
-    "probot-app-pr-title": "^1.1.5",
-    "probot-app-todos": "1.0.5"
+    "probot-app-pr-title": "^1.1.8-0",
+    "probot-app-todos": "^1.0.6-0"
   },
   "probot": {
     "apps": [