test: add fuzzing for string_view constructor

Author: anonrig

fuzz/parse.cc

@@ -100,6 +100,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
   /**
    * ada::url_search_params
    */
+  ada::url_search_params(base_source_view);
+
   auto search_params = ada::url_search_params();
   search_params.append(source, base_source);
   search_params.set(source, base_source);