Conditions Constant Restore

- Conditions can now be constant again.

Author: rayliverified

lib/responsive_value.dart

@@ -154,7 +154,7 @@ class Condition<T> {
   final String? name;
   final Conditional? condition;
   final T? value;
-  late T? landscapeValue;
+  final T? landscapeValue;
 
   Condition._(
       {this.breakpointStart,
@@ -167,28 +167,28 @@ class Condition<T> {
         assert(breakpointStart != null || name != null),
         assert((condition == Conditional.EQUALS) ? name != null : true);
 
-  Condition.equals({required this.name, this.value, T? landscapeValue})
+  const Condition.equals({required this.name, this.value, T? landscapeValue})
       : landscapeValue = (landscapeValue ?? value),
         breakpointStart = null,
         breakpointEnd = null,
         condition = Conditional.EQUALS;
 
-  Condition.largerThan(
+  const Condition.largerThan(
       {int? breakpoint, this.name, this.value, T? landscapeValue})
       : landscapeValue = (landscapeValue ?? value),
         breakpointStart = breakpoint,
         breakpointEnd = breakpoint,
         condition = Conditional.LARGER_THAN;
 
-  Condition.smallerThan(
+  const Condition.smallerThan(
       {int? breakpoint, this.name, this.value, T? landscapeValue})
       : landscapeValue = (landscapeValue ?? value),
         breakpointStart = breakpoint,
         breakpointEnd = breakpoint,
         condition = Conditional.SMALLER_THAN;
 
   /// Conditional when screen width is between [start] and [end] inclusive.
-  Condition.between(
+  const Condition.between(
       {required int? start, required int? end, this.value, T? landscapeValue})
       : landscapeValue = (landscapeValue ?? value),
         breakpointStart = start,