Pin dependencies (#71)

package.json

@@ -27,14 +27,14 @@
     "node-fetch": "2.6.0",
     "node-opus": "0.3.2",
     "node-sass": "4.12.0",
-    "pg": "^7.8.2",
+    "pg": "7.12.1",
     "promise-waterfall": "0.1.0",
     "pug": "2.0.4",
     "sqlite3": "4.1.0",
     "winston": "3.2.1",
     "winston-daily-rotate-file": "4.2.1",
     "youtube-playlist-info": "1.1.2",
-    "ytdl-core-discord": "^1.0.3"
+    "ytdl-core-discord": "1.0.3"
   },
   "devDependencies": {
     "assert": "2.0.0",