first take basing fuzz on v3

fuzzing/fuzz_TestSpecParser.cpp

@@ -0,0 +1,16 @@
+//License: Boost 1.0
+//By Paul Dreik 2020
+
+#include <catch2/internal/catch_test_spec_parser.hpp>
+#include <catch2/internal/catch_tag_alias_registry.hpp>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
+
+    Catch::TagAliasRegistry tar;
+    Catch::TestSpecParser tsp(tar);
+
+    std::string buf(Data,Data+Size);
+    tsp.parse(buf);
+
+    return 0;
+}