nostrdb: pull latest, adding flatcc and lmdb

nostrdb/flatcc/CMakeLists.txt

@@ -0,0 +1,16 @@
+include_directories (
+    "${PROJECT_SOURCE_DIR}/include"
+)
+
+add_library(flatccrt
+    builder.c
+    emitter.c
+    refmap.c
+    verifier.c
+    json_parser.c
+    json_printer.c
+)
+
+if (FLATCC_INSTALL)
+    install(TARGETS flatccrt DESTINATION ${lib_dir})
+endif()