Adding pg to peerDependencies (brianc#2471)

* Adding pg to peerDependencies

Yarn2 requires strict imports, I.E. all project dependencies need to exist in that project's package.json.

* pg version should be locked on the major version

Co-authored-by: Charmander <~@charmander.me>

Co-authored-by: Charmander <~@charmander.me>

Author: ed0wolf

packages/pg-cursor/package.json

@@ -19,5 +19,8 @@
   "devDependencies": {
     "mocha": "^7.1.2",
     "pg": "^8.5.1"
+  },
+  "peerDependencies": {
+    "pg": "^8"
   }
 }