Fix 64-bit numeric enum values in typescript (#7135)

* Fix 64-bit default numeric enum values in typescript

If you had a default value that wasn't a valid enum value (e.g., a zero
if you used a bit_flag setting, like you get with AdvancedFeatures
in reflection.fbs), we weren't using BigInt.

* Run generate_code.py

* [DART] Handle deprecated fields & invalid enum defaults

* Update .NET test

tests/my-game/example/long-enum.ts

@@ -0,0 +1,8 @@
+// automatically generated by the FlatBuffers compiler, do not modify
+
+export enum LongEnum{
+  LongOne = '2',
+  LongTwo = '4',
+  LongBig = '1099511627776'
+}
+

tests/my-game/example/monster.ts

@@ -651,12 +651,44 @@ nativeInline(obj?:Test):Test|null {
   return offset ? (obj || new Test()).__init(this.bb_pos + offset, this.bb!) : null;
 }
 
+longEnumNonEnumDefault():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 108);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('0');
+}
+
+mutate_long_enum_non_enum_default(value:bigint):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 108);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeUint64(this.bb_pos + offset, value);
+  return true;
+}
+
+longEnumNormalDefault():bigint {
+  const offset = this.bb!.__offset(this.bb_pos, 110);
+  return offset ? this.bb!.readUint64(this.bb_pos + offset) : BigInt('2');
+}
+
+mutate_long_enum_normal_default(value:bigint):boolean {
+  const offset = this.bb!.__offset(this.bb_pos, 110);
+
+  if (offset === 0) {
+    return false;
+  }
+
+  this.bb!.writeUint64(this.bb_pos + offset, value);
+  return true;
+}
+
 static getFullyQualifiedName():string {
   return 'MyGame.Example.Monster';
 }
 
 static startMonster(builder:flatbuffers.Builder) {
-  builder.startObject(52);
+  builder.startObject(54);
 }
 
 static addPos(builder:flatbuffers.Builder, posOffset:flatbuffers.Offset) {
@@ -1084,6 +1116,14 @@ static addNativeInline(builder:flatbuffers.Builder, nativeInlineOffset:flatbuffe
   builder.addFieldStruct(51, nativeInlineOffset, 0);
 }
 
+static addLongEnumNonEnumDefault(builder:flatbuffers.Builder, longEnumNonEnumDefault:bigint) {
+  builder.addFieldInt64(52, longEnumNonEnumDefault, BigInt('0'));
+}
+
+static addLongEnumNormalDefault(builder:flatbuffers.Builder, longEnumNormalDefault:bigint) {
+  builder.addFieldInt64(53, longEnumNormalDefault, BigInt('2'));
+}
+
 static endMonster(builder:flatbuffers.Builder):flatbuffers.Offset {
   const offset = builder.endObject();
   builder.requiredField(offset, 10) // name
@@ -1171,7 +1211,9 @@ unpack(): MonsterT {
     this.signedEnum(),
     this.bb!.createScalarList(this.testrequirednestedflatbuffer.bind(this), this.testrequirednestedflatbufferLength()),
     this.bb!.createObjList(this.scalarKeySortedTables.bind(this), this.scalarKeySortedTablesLength()),
-    (this.nativeInline() !== null ? this.nativeInline()!.unpack() : null)
+    (this.nativeInline() !== null ? this.nativeInline()!.unpack() : null),
+    this.longEnumNonEnumDefault(),
+    this.longEnumNormalDefault()
   );
 }
 
@@ -1240,6 +1282,8 @@ unpackTo(_o: MonsterT): void {
   _o.testrequirednestedflatbuffer = this.bb!.createScalarList(this.testrequirednestedflatbuffer.bind(this), this.testrequirednestedflatbufferLength());
   _o.scalarKeySortedTables = this.bb!.createObjList(this.scalarKeySortedTables.bind(this), this.scalarKeySortedTablesLength());
   _o.nativeInline = (this.nativeInline() !== null ? this.nativeInline()!.unpack() : null);
+  _o.longEnumNonEnumDefault = this.longEnumNonEnumDefault();
+  _o.longEnumNormalDefault = this.longEnumNormalDefault();
 }
 }
 
@@ -1295,7 +1339,9 @@ constructor(
   public signedEnum: Race = Race.None,
   public testrequirednestedflatbuffer: (number)[] = [],
   public scalarKeySortedTables: (StatT)[] = [],
-  public nativeInline: TestT|null = null
+  public nativeInline: TestT|null = null,
+  public longEnumNonEnumDefault: bigint = BigInt('0'),
+  public longEnumNormalDefault: bigint = BigInt('2')
 ){}
 
 
@@ -1380,6 +1426,8 @@ pack(builder:flatbuffers.Builder): flatbuffers.Offset {
   Monster.addTestrequirednestedflatbuffer(builder, testrequirednestedflatbuffer);
   Monster.addScalarKeySortedTables(builder, scalarKeySortedTables);
   Monster.addNativeInline(builder, (this.nativeInline !== null ? this.nativeInline!.pack(builder) : 0));
+  Monster.addLongEnumNonEnumDefault(builder, this.longEnumNonEnumDefault);
+  Monster.addLongEnumNormalDefault(builder, this.longEnumNormalDefault);
 
   return Monster.endMonster(builder);
 }