fix: explicitly handle num equality comparisons (#189)

lib/src/equatable_utils.dart

@@ -21,6 +21,10 @@ bool iterableEquals(Iterable<Object?> a, Iterable<Object?> b) {
   return true;
 }
 
+/// Determines whether two numbers are equal.
+@pragma('vm:prefer-inline')
+bool numEquals(num a, num b) => a == b;
+
 /// Determines whether two sets are equal.
 bool setEquals(Set<Object?> a, Set<Object?> b) {
   if (identical(a, b)) return true;
@@ -45,7 +49,9 @@ bool mapEquals(Map<Object?, Object?> a, Map<Object?, Object?> b) {
 @pragma('vm:prefer-inline')
 bool objectsEquals(Object? a, Object? b) {
   if (identical(a, b)) return true;
-  if (_isEquatable(a) && _isEquatable(b)) {
+  if (a is num && b is num) {
+    return numEquals(a, b);
+  } else if (_isEquatable(a) && _isEquatable(b)) {
     return a == b;
   } else if (a is Set && b is Set) {
     return setEquals(a, b);

test/equatable_utils_test.dart

@@ -262,5 +262,22 @@ void main() {
     test('returns false for different types', () {
       expect(objectsEquals(1, '1'), isFalse);
     });
+
+    test('returns true when two nums have the same value (int and double)', () {
+      const num a = 0;
+      const num b = 0.0;
+      expect(objectsEquals(a, b), isTrue);
+    });
+
+    test('returns true when two nums are identical', () {
+      const num a = 0;
+      expect(objectsEquals(a, a), isTrue);
+    });
+
+    test('returns false when two nums have different values', () {
+      const num a = 0;
+      const num b = 1;
+      expect(objectsEquals(a, b), isFalse);
+    });
   });
 }