expand property schema when inserting text (#49)

Expand property schema when inserting text. This fixes cases like
`dependencies` field in the package.json schema which just contains a
reference to a schema definition.

<img width="336" alt="Screenshot 2023-07-29 at 5 51 32 PM"
src="https://github.com/acao/codemirror-json-schema/assets/4608143/f10d8d6f-111e-45ee-9ed9-544870ea5b89">

Author: imolorhe

.changeset/purple-bags-rescue.md

@@ -0,0 +1,5 @@
+---
+"codemirror-json-schema": patch
+---
+
+expand property schema when inserting text

src/json-completion.ts

@@ -258,6 +258,11 @@ export class JSONCompletion {
     addValue: boolean,
     propertySchema?: JSONSchema7Definition
   ) {
+    // expand schema property if it is a reference
+    propertySchema = propertySchema
+      ? this.expandSchemaProperty(propertySchema, this.schema)
+      : propertySchema;
+
     let resultText = `"${key}"`;
     if (!addValue) {
       return resultText;
@@ -334,6 +339,14 @@ export class JSONCompletion {
       }
     }
     if (!value || nValueProposals > 1) {
+      debug.log(
+        "xxx",
+        "value",
+        value,
+        "nValueProposals",
+        nValueProposals,
+        propertySchema
+      );
       value = "#{}";
     }