src: add --pending-deprecation to NODE_OPTIONS

PR-URL: https://github.com/nodejs/node/pull/15494
Fixes: https://github.com/nodejs/node/issues/15484
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

src/node.cc

@@ -3913,6 +3913,7 @@ static void CheckIfAllowedInEnv(const char* exe, bool is_env,
     "--no-deprecation",
     "--trace-deprecation",
     "--throw-deprecation",
+    "--pending-deprecation",
     "--no-warnings",
     "--napi-modules",
     "--expose-http2",