Revert "chore: mark optional peerDependencies as optional (discordjs#…

…3511)"

This reverts commit e68e67d.

package.json

@@ -54,29 +54,6 @@
     "zlib-sync": "^0.1.4",
     "zucc": "^0.1.0"
   },
-  "peerDependenciesMeta": {
-    "@discordjs/uws": {
-      "optional": true
-    },
-    "bufferutil": {
-      "optional": true
-    },
-    "erlpack": {
-      "optional": true
-    },
-    "libsodium-wrappers": {
-      "optional": true
-    },
-    "sodium": {
-      "optional": true
-    },
-    "zlib-sync": {
-      "optional": true
-    },
-    "zucc": {
-      "optional": true
-    }
-  },
   "devDependencies": {
     "@types/node": "^10.12.24",
     "@types/ws": "^6.0.1",