add tests for bitmatrix out of bounds panic

addresses #27 and #28

tests/github_issues.rs

@@ -0,0 +1,24 @@
+use std::io::Read;
+
+use rxing::DecodingHintDictionary;
+
+#[test]
+fn issue_27_part_2() {
+    let mut data = Vec::new();
+    std::fs::File::open("test_resources/blackbox/github_issue_cases/226611447-be6041dc-5b21-42fe-827b-068ccc59082c.png")
+        .unwrap()
+        .read_to_end(&mut data)
+        .unwrap();
+
+    rxing::helpers::detect_multiple_in_luma(data, 720, 618).unwrap_or_default();
+}
+
+#[test]
+fn issue_28() {
+    let mut hints: DecodingHintDictionary = DecodingHintDictionary::new();
+    hints.insert(
+        rxing::DecodeHintType::TRY_HARDER,
+        rxing::DecodeHintValue::TryHarder(true),
+    );
+    rxing::helpers::detect_multiple_in_file_with_hints("test_resources/blackbox/github_issue_cases/226611447-be6041dc-5b21-42fe-827b-068ccc59082c.png", &mut hints).unwrap_or_default();
+}