chore: Add missing deps (#4317)

packages/medusa-plugin-brightpearl/package.json

@@ -21,6 +21,7 @@
     "@babel/preset-env": "^7.7.5",
     "@babel/register": "^7.7.4",
     "@babel/runtime": "^7.9.6",
+    "@medusajs/medusa": "^1.12.0",
     "axios-mock-adapter": "^1.18.2",
     "axios-mock-server": "^0.19.1",
     "client-sessions": "^0.8.0",
@@ -36,6 +37,7 @@
     "watch": "babel -w src --out-dir . --ignore '**/__tests__','**/__mocks__'"
   },
   "peerDependencies": {
+    "@medusajs/medusa": "^1.12.0",
     "medusa-interfaces": "^1.3.7"
   },
   "dependencies": {