Update package.json

Insert default value for each predefined key if selected. Also improve validation (currently only visible when editing JSON directly). Aim is to reduce the chance of people defining destructive mappings. Yellow warning squiggles will show in JSON, with details on hover and in Problems panel.

Author: gjsjohnmurray

package.json

@@ -755,27 +755,27 @@
               "%(.*)": "_$1"
             }
           ],
-          "patternProperties": {
-            ".*": {
-              "type": "string"
-            }
-          },
-          "properties": {
-            "%(.*)": {
-              "description": "Catch any % items. Set value to `_$1` to replace `%` prefix with `_`",
-              "type": "string",
-              "examples": [
-                "_$1"
-              ]
-            },
-            "(.*)": {
-              "description": "Match everything. Set value to `$1` to leave unchanged",
-              "type": "string",
-              "examples": [
-                "$1"
-              ]
-            }
-          }
+					"patternProperties": {
+						"\\(.*\\)": {
+							"type": "string",
+							"pattern": "\\$1"
+						}
+					},
+					"properties": {
+						"%(.*)": {
+							"description": "Catch any % items. Set value to `_$1` to replace `%` prefix with `_`",
+							"type": "string",
+							"pattern": "\\$1",
+							"default": "_$1"
+						},
+						"(.*)": {
+							"description": "Match everything. Set value to `$1` to leave unchanged",
+							"type": "string",
+							"pattern": "\\$1",
+							"default": "$1"
+						}
+					},
+					"additionalProperties": false
         },
         "objectscript.export.atelier": {
           "description": "Export source code as Atelier did it, with packages as subfolders.",