feat: Deserialize char from number (libgdx#7570)

Author: SimonIT

gdx/src/com/badlogic/gdx/utils/Json.java

@@ -1144,6 +1144,7 @@ protected boolean ignoreUnknownField (Class type, String fieldName) {
 				if (type == String.class) return (T)jsonData.asString();
 				if (type == short.class || type == Short.class) return (T)(Short)jsonData.asShort();
 				if (type == byte.class || type == Byte.class) return (T)(Byte)jsonData.asByte();
+				if (type == char.class || type == Character.class) return (T)(Character)jsonData.asChar();
 			} catch (NumberFormatException ignored) {
 			}
 			jsonData = new JsonValue(jsonData.asString());

gdx/test/com/badlogic/gdx/utils/JsonTest.java

@@ -22,6 +22,13 @@ public void testFromJsonArray () {
 		assertEquals("value2", value.get(1));
 	}
 
+	@Test
+	public void testCharFromNumber () {
+		Json json = new Json();
+		char value = json.fromJson(char.class, "90");
+		assertEquals('Z', value);
+	}
+
 	@Test
 	public void testReuseReader () {
 		Json json = new Json();