Added packages.to to keep up with python-poetry/poetry-core#672 (Sche…

…maStore#3807)

src/schemas/json/partial-poetry.json

@@ -509,6 +509,10 @@
           },
           "format": {
             "$ref": "#/definitions/poetry-package-formats"
+          },
+          "to": {
+            "type": "string",
+            "description": "Where the package should be installed in the final distribution."
           }
         }
       }