message: doc: Update libnatpmp info in dependencies.md
diff: @@ -14,7 +14,7 @@ These are the dependencies currently used by Peercoin. You can find instructions
  | GCC | | [7+](https://gcc.gnu.org/) (C++17 support) | | | |
  | HarfBuzz-NG | | | | | [Yes](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk) |
  | libevent | [2.1.11-stable](https://github.com/libevent/libevent/releases) | [2.0.21](https://github.com/bitcoin/bitcoin/pull/18676) | No | | |
  -| libnatpmp | [20150609](https://miniupnp.tuxfamily.org/files) | | No | | |
  +| libnatpmp | git commit [4536032...](https://github.com/miniupnp/libnatpmp/tree/4536032ae32268a45c073a4d5e91bbab4534773a) | | No | | |
  | libpng | | | | | [Yes](https://github.com/bitcoin/bitcoin/blob/master/depends/packages/qt.mk) |
  | librsvg | | | | | |
  | MiniUPnPc | [2.0.20180203](https://miniupnp.tuxfamily.org/files) | | No | | |
  