chore(deps): upgrade 'prebuild' and 'nan'

[abetomo]

prebuild

gyp ERR! stack Error: Command failed: python -c import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack   File "<string>", line 1
gyp ERR! stack     import sys; print "%s.%s.%s" % sys.version_info[:3];
gyp ERR! stack                       ^
gyp ERR! stack SyntaxError: invalid syntax

nan

  CXX(target) Release/obj.target/binding/src/binding.o
In file included from ../src/./binding.h:6,
                 from ../src/binding.cc:1:
../node_modules/nan/nan.h: In function ‘void Nan::AsyncQueueWorker(Nan::AsyncWorker*)’:
../node_modules/nan/nan.h:2294:62: warning: cast between incompatible function types from ‘void (*)(uv_work_t*)’ {aka ‘void (*)(uv_work_s*)’} to ‘uv_after_work_cb’ {aka ‘void (*)(uv_work_s*, int)’} [-Wcast-function-type]
 2294 |     , reinterpret_cast<uv_after_work_cb>(AsyncExecuteComplete)