message: build: add vs warning 4309 to ignore list [skip ci]
diff: # 4506 and 4838 -> about v8 inline function and narrowing
  # 4068 -> Unknown pragma (mostly GCC pragmas being used)
  # 4996 -> Declared wrongly Nan::Callback::Call
  - 'DisableSpecificWarnings': ['4244', '4506', '4068', '4838', '4996'],
  + # 4309 -> 'static_cast': truncation of constant value on v8 header
  + 'DisableSpecificWarnings': ['4244', '4506', '4068', '4838', '4996', '4309'],
  'AdditionalOptions': [
  '/MP', #compile across multiple CPUs
  ],
  