tiny_tds don't compile on ruby 3.1.3 on W10

[net1957]

just opened a issue about tiny_tds on rubyinstaller2
(oneclick/rubyinstaller2#319)

not sure which code is affected.

[Largo]

can be closed after PR is merged

[andyundso]

If you don't want to use the platform-specific gems, the fix submitted by @Largo has been merged with #544 (original PR: #536). Otherwise, the platform-specific gem for x64-mingw-ucrt is available with the new release 2.1.6.