add missing disabled rule

Author: silverwind

.eslintrc

@@ -223,6 +223,7 @@ rules:
   no-octal: [2]
   no-param-reassign: [0]
   no-path-concat: [0]
+  no-plusplus: [0]
   no-process-env: [0]
   no-process-exit: [0]
   no-proto: [2]