Update unexpected the dev dep to ^13.0.0, allow 13 for the peer dep

Author: papandreou

package.json

@@ -25,7 +25,7 @@
   },
   "peerDependencies": {
     "chance-generators": "^3.0.0",
-    "unexpected": "^10.40.0 || ^11.0.0-4 || ^12.0.0"
+    "unexpected": "^10.40.0 || ^11.0.0-4 || ^12.0.0 || ^13.0.0"
   },
   "devDependencies": {
     "babel-cli": "^6.26.0",
@@ -46,7 +46,7 @@
     "offline-github-changelog": "^1.2.0",
     "prettier": "~2.5.1",
     "serve": "^11.0.0",
-    "unexpected": "^12.0.0",
+    "unexpected": "^13.0.0",
     "unexpected-documentation-site-generator": "^6.1.0",
     "unexpected-markdown": "^4.1.1",
     "unexpected-stream": "^5.1.0"