maintainers.nix: use my GitHub handle as maintainer name

lib/maintainers.nix

···
   mikefaille = "Michaël Faille <[e-mail]>";
   miltador = "Vasiliy Solovey <[e-mail]>";
   mimadrid = "Miguel Madrid <[e-mail]>";
-  mingchuan = "Ming Chuan <[e-mail]>";
   mirdhyn = "Merlin Gaillard <[e-mail]>";
   mirrexagon = "Andrew Abbott <[e-mail]>";
   mjanczyk = "Marcin Janczyk <[e-mail]>";
···
   shell = "Shell Turner <[e-mail]>";
   shlevy = "Shea Levy <[e-mail]>";
   siddharthist = "Langston Barrett <[e-mail]>";
+  sifmelcara = "Ming Chuan <[e-mail]>";
   sigma = "Yann Hodique <[e-mail]>";
   simonvandel = "Simon Vandel Sillesen <[e-mail]>";
   sivteck = "Sivaram Balakrishnan <[e-mail]>";

pkgs/applications/misc/pcmanx-gtk2/default.nix

···
     homepage = http://pcman.ptt.cc;
     license = licenses.gpl2;
     description = "Telnet BBS browser with GTK+ interface";
-    maintainers = [ maintainers.mingchuan ];
+    maintainers = [ maintainers.sifmelcara ];
     platforms = platforms.linux;
   };
 }

pkgs/data/misc/brise/default.nix

···
     # may be released under different licenses
     license = licenses.gpl3;
     platforms = platforms.all;
-    maintainers = [ maintainers.mingchuan ];
+    maintainers = [ maintainers.sifmelcara ];
   };
 }

pkgs/development/compilers/crystal/default.nix

···
     description = "A compiled language with Ruby like syntax and type inference";
     homepage = https://crystal-lang.org/;
     license = stdenv.lib.licenses.asl20;
-    maintainers = with stdenv.lib.maintainers; [ mingchuan ];
+    maintainers = with stdenv.lib.maintainers; [ sifmelcara ];
     platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ];
   };
 }

pkgs/development/libraries/librime/default.nix

···
     homepage    = http://rime.im/;
     description = "Rime Input Method Engine, the core library";
     license     = licenses.bsd3;
-    maintainers = with maintainers; [ mingchuan ];
+    maintainers = with maintainers; [ sifmelcara ];
     platforms   = platforms.all;
   };
 }

pkgs/development/libraries/marisa/default.nix

···
     homepage    = https://code.google.com/p/marisa-trie/;
     description = "Static and space-efficient trie data structure library";
     license     = licenses.bsd3;
-    maintainers = with maintainers; [ mingchuan ];
+    maintainers = with maintainers; [ sifmelcara ];
     platforms   = platforms.all;
   };
 }

pkgs/development/tools/build-managers/shards/default.nix

···
     homepage = https://crystal-lang.org/;
     license = licenses.asl20;
     description = "Dependency manager for the Crystal language";
-    maintainers = with maintainers; [ mingchuan ];
+    maintainers = with maintainers; [ sifmelcara ];
     platforms = [ "x86_64-linux" "i686-linux" "x86_64-darwin" ];
   };
 }

pkgs/tools/inputmethods/fcitx-engines/fcitx-rime/default.nix

···
     description   = "Rime support for Fcitx";
     license       = licenses.gpl2;
     platforms     = platforms.linux;
-    maintainers   = with maintainers; [ mingchuan ];
+    maintainers   = with maintainers; [ sifmelcara ];
   };
 }

pkgs/tools/text/opencc/default.nix

···
       phrase-level conversion, variant conversion and regional idioms among Mainland China,
       Taiwan and Hong kong.
     '';
-    maintainers = [ maintainers.mingchuan ];
+    maintainers = [ maintainers.sifmelcara ];
     platforms = platforms.linux;
   };
 }