updated .travis.yml

Author: hoc081098

.travis.yml

@@ -7,7 +7,7 @@ script:
   - dartfmt -n ./lib --set-exit-if-changed
   - pub get
   - pub global activate coverage
-  - pub run test/rx_storage_test.dart
+  - pub run --enable-asserts test/rx_storage_test.dart
   - dart
     --disable-service-auth-codes
     --enable-vm-service=8111

test/stream_extensions/map_not_null_test.dart

@@ -22,7 +22,7 @@ void main() {
     test('Rx.mapNotNull.shouldThrowA', () {
       expect(
         () => Stream.value(42).mapNotNull(null),
-        throwsA(const TypeMatcher<AssertionError>()),
+        throwsA(isA<AssertionError>()),
       );
     });