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/MyGame/Example/Monster.lua

@@ -687,8 +687,24 @@ function mt:NativeInline()
   end
 end
 
+function mt:LongEnumNonEnumDefault()
+  local o = self.view:Offset(108)
+  if o ~= 0 then
+    return self.view:Get(flatbuffers.N.Uint64, self.view.pos + o)
+  end
+  return 0
+end
+
+function mt:LongEnumNormalDefault()
+  local o = self.view:Offset(110)
+  if o ~= 0 then
+    return self.view:Get(flatbuffers.N.Uint64, self.view.pos + o)
+  end
+  return 2
+end
+
 function Monster.Start(builder)
-  builder:StartObject(52)
+  builder:StartObject(54)
 end
 
 function Monster.AddPos(builder, pos)
@@ -975,6 +991,14 @@ function Monster.AddNativeInline(builder, nativeInline)
   builder:PrependStructSlot(51, nativeInline, 0)
 end
 
+function Monster.AddLongEnumNonEnumDefault(builder, longEnumNonEnumDefault)
+  builder:PrependUint64Slot(52, longEnumNonEnumDefault, 0)
+end
+
+function Monster.AddLongEnumNormalDefault(builder, longEnumNormalDefault)
+  builder:PrependUint64Slot(53, longEnumNormalDefault, 2)
+end
+
 function Monster.End(builder)
   return builder:EndObject()
 end