Handle ENOENT Windows lookup failures

[pimterry]

Fixes #49

This can happen when, for example, you query with {family:6} on Windows but only IPv4 resolution is available.

It's very difficult to pin down all the possible error cases for DNS, but I think this happens because:

• uv__getaddrinfo_translate_error in libuv for Windows falls back to uv_translate_sys_error (here)
• uv_translate_sys_error maps WSANO_DATA to ENOENT (here)
• WSANO_DATA is returned by Windows when the name exists, but not the requested record type. See https://docs.microsoft.com/en-us/windows/win32/winsock/windows-sockets-error-codes-2, which says:

  The requested name is valid and was found in the database, but it does not have the correct associated data being resolved for. The usual example for this is a host name-to-address translation attempt (using gethostbyname or WSAAsyncGetHostByName) which uses the DNS (Domain Name Server). An MX record is returned but no A record—indicating the host itself exists, but is not directly reachable.

This shouldn't ever be returned on Unix OSs, which have their own separate & fixed list of possible errors (here).

There's more discussion and an (unmerged) PR to fix this properly and line up Unix & Windows DNS error handling here: libuv/libuv#2959

[codecov-commenter]

Codecov Report

Merging #50 (c39038f) into master (4a22f87) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #50   +/-   ##
=======================================
  Coverage   98.98%   98.98%           
=======================================
  Files           1        1           
  Lines         197      197           
=======================================
  Hits          195      195           
  Misses          2        2           

Impacted Files	Coverage Δ
source/index.js	98.98% <100.00%> (ø)

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[szmarczak]

Thanks! 🙌🏼 Released 6.0.4

[pimterry]

Awesome, thanks! 👍