src: add NODE_VERSION_IS_LTS to node_version.h

This is defined in LTS releases, but should really be defined in master
too.

PR-URL: #16697
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

Author: gibfahn

src/node_version.h

@@ -26,6 +26,9 @@
 #define NODE_MINOR_VERSION 2
 #define NODE_PATCH_VERSION 2
 
+#define NODE_VERSION_IS_LTS 0
+#define NODE_VERSION_LTS_CODENAME ""
+
 #define NODE_VERSION_IS_RELEASE 0
 
 #ifndef NODE_STRINGIFY