added test case of having an Empty Map as a Map Value (#81)

* added test case of having an Empty Map as a Map Value

* added test case of having an Empty Map as a Map Value
diff --git a/test/run_tests.c b/test/run_tests.c
index 0146d93..5fb0895 100644
--- a/test/run_tests.c
+++ b/test/run_tests.c
@@ -130,6 +130,7 @@
     TEST_ENTRY(ExponentAndMantissaDecodeFailTests),
     TEST_ENTRY(ExponentAndMantissaEncodeTests),
 #endif /* QCBOR_CONFIG_DISABLE_EXP_AND_MANTISSA */
+    TEST_ENTRY(ParseEmptyMapInMapTest),
 };