Fix missing string type on dataExtensions

extensions/ql-vscode/src/model-editor/extension-pack-metadata.schema.json

@@ -12,10 +12,17 @@
           }
         },
         "dataExtensions": {
-          "type": "array",
-          "items": {
-            "type": "string"
-          }
+          "anyOf": [
+            {
+              "type": "array",
+              "items": {
+                "type": "string"
+              }
+            },
+            {
+              "type": "string"
+            }
+          ]
         },
         "name": {
           "type": "string"

extensions/ql-vscode/src/model-editor/extension-pack-metadata.ts

@@ -3,5 +3,5 @@ import { QlPackFile } from "../packaging/qlpack-file";
 export type ExtensionPackMetadata = QlPackFile & {
   // Make both extensionTargets and dataExtensions required
   extensionTargets: Record<string, string>;
-  dataExtensions: string[];
+  dataExtensions: string[] | string;
 };

extensions/ql-vscode/src/packaging/qlpack-file.ts

@@ -12,5 +12,5 @@ export interface QlPackFile {
   library?: boolean;
   defaultSuite?: SuiteInstruction[];
   defaultSuiteFile?: string;
-  dataExtensions?: string[];
+  dataExtensions?: string[] | string;
 }