Update environment generated file

lib/gnss_sentences/gngst.dart

@@ -0,0 +1,18 @@
+import 'package:nmea/nmea.dart';
+
+class Gngst extends TalkerSentence {
+  static const String id = "GNGST";
+  Gngst({required super.raw});
+
+  @override
+  bool get valid => super.valid && fields.length == 9;
+
+  String get utcOfPositionFix => fields[1];
+  double get rms => double.parse(fields[2]);
+  double get errorEllipseSemiMajorAxis => double.parse(fields[3]);
+  double get errorEllipseSemiMinorAxis => double.parse(fields[4]);
+  double get errorEllipseOrientation => double.parse(fields[5]);
+  double get longitudeError => double.parse(fields[6]);
+  double get latitudeError => double.parse(fields[7]);
+  double get heightError => double.parse(fields[8]);
+}