Add censor plugin. Various other fixes/features. Update Knub to 9.4.13.

package.json

@@ -29,14 +29,16 @@
     "@types/node": "^8.0.50",
     "dotenv": "^4.0.0",
     "eris": "^0.8.6",
+    "escape-string-regexp": "^1.0.5",
     "humanize-duration": "^3.15.0",
     "knex": "^0.14.6",
-    "knub": "^9.4.11",
+    "knub": "^9.4.13",
     "lodash.at": "^4.6.0",
     "lodash.difference": "^4.5.0",
     "lodash.isequal": "^4.5.0",
     "mariasql": "^0.2.6",
     "moment-timezone": "^0.5.21",
+    "tlds": "^1.203.1",
     "ts-node": "^3.3.0",
     "typescript": "^2.9.2"
   },