✅ Update specs

Author: siguici

spec/hello_test.v

@@ -0,0 +1,9 @@
+import vest { filter }
+
+fn test_is_bool() {
+	assert filter(true).is_bool() == true
+	assert filter(false).is_bool() == true
+	assert filter(1).is_bool() == false
+	assert filter('').is_bool() == false
+	assert filter([u8(1)]).is_bool() == false
+}

spec/vest_test.v

@@ -1,4 +1,6 @@
-import vut { expect }
+import vunit { expect }
+
+// Test ensure, assert and expect
 
 fn test_primitive() {
 	expect(false).to_be_primitive()