Set moment default timezone to UTC

This requires switching to the moment-timezone package.
This is for consistensy with knexfile, which already sets the DB timezone to UTC.

package-lock.json

@@ -27,6 +27,14 @@
         "@types/node": "*"
       }
     },
+    "@types/moment-timezone": {
+      "version": "0.5.6",
+      "resolved": "https://registry.npmjs.org/@types/moment-timezone/-/moment-timezone-0.5.6.tgz",
+      "integrity": "sha512-rMZjLmXs9sly1UbwxckyAEvQkrwrGqR24nFAjFrndRJBBnUooCCD0LPmdRcf9haHXFnckI9E3ko0oC6LEDk7dw==",
+      "requires": {
+        "moment": ">=2.14.0"
+      }
+    },
     "@types/node": {
       "version": "8.10.20",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-8.10.20.tgz",
@@ -2629,6 +2637,14 @@
       "resolved": "https://registry.npmjs.org/moment/-/moment-2.22.2.tgz",
       "integrity": "sha1-PCV/mDn8DpP/UxSWMiOeuQeD/2Y="
     },
+    "moment-timezone": {
+      "version": "0.5.21",
+      "resolved": "https://registry.npmjs.org/moment-timezone/-/moment-timezone-0.5.21.tgz",
+      "integrity": "sha512-j96bAh4otsgj3lKydm3K7kdtA3iKf2m6MY2iSYCzCm5a1zmHo1g+aK3068dDEeocLZQIS9kU8bsdQHLqEvgW0A==",
+      "requires": {
+        "moment": ">= 2.9.0"
+      }
+    },
     "ms": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",

package.json

@@ -22,13 +22,14 @@
   "license": "ISC",
   "dependencies": {
     "@types/knex": "0.0.64",
+    "@types/moment-timezone": "^0.5.6",
     "@types/node": "^8.0.50",
     "dotenv": "^4.0.0",
     "eris": "^0.8.6",
     "knex": "^0.14.6",
     "knub": "^9.4.3",
     "mariasql": "^0.2.6",
-    "moment": "^2.20.1",
+    "moment-timezone": "^0.5.21",
     "ts-node": "^3.3.0",
     "typescript": "^2.6.1"
   },

src/index.ts

@@ -6,6 +6,11 @@ process.on("unhandledRejection", (reason, p) => {
   process.exit();
 });
 
+// Always use UTC
+// This is also set for the database in knexfile
+import moment from "moment-timezone";
+moment.tz.setDefault("UTC");
+
 import { Client } from "eris";
 import { Knub, logger } from "knub";
 import { BotControlPlugin } from "./plugins/BotControl";

src/plugins/ModActions.ts

@@ -7,7 +7,7 @@ import {
   TextChannel,
   User
 } from "eris";
-import * as moment from "moment";
+import * as moment from "moment-timezone";
 import { GuildModActions } from "../data/GuildModActions";
 
 enum ActionType {