bracket-push: update to v1.1.0

https://github.com/exercism/problem-specifications/commit/855c59149e6ba66c3c0495888cef203fcc231960#diff-8257653ce323d3cbdfb5ecf45b0e0d93

exercises/bracket-push/.meta/version

@@ -1 +1 @@
-1.0.0
+1.1.0

exercises/bracket-push/src/test/java/BracketCheckerTest.java

@@ -1,7 +1,6 @@
 import org.junit.Ignore;
 import org.junit.Test;
 
-import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
@@ -36,6 +35,13 @@ public class BracketCheckerTest {
 
     @Ignore("Remove to run test")
     @Test
+    public void testSingleOpenBracketWithIncorrectClosingBracket() {
+        final BracketChecker bracketChecker = new BracketChecker("{]");
+        assertFalse(bracketChecker.areBracketsMatchedAndNestedCorrectly());
+    }
+
+    @Ignore("Remove to run test")
+    @Test
     public void testPairedBracketsWithWhitespace() {
         final BracketChecker bracketChecker = new BracketChecker("{ }");
         assertTrue(bracketChecker.areBracketsMatchedAndNestedCorrectly());