feat: Compatibility for Node 16

Author: Hazmi35

.node-version

@@ -0,0 +1 @@
+16

binding.gyp

@@ -8,9 +8,6 @@
       'include_dirs': [
         '<!(node -e \"require(\'nan\')\")',
       ],
-      'cflags_cc': [
-        '-std=c++11',
-      ],
       'sources': [
         'js/encoder.h',
         'js/erlpack.cc',