Fix the release artifact: .nupkgs is hidden, so it uploaded nothing (#…

…223)

The first dry run of release.yml went green while quietly producing no artifact:

    ##[warning]No files were found with the provided path: .nupkgs/*.nupkg.
    No artifacts will be uploaded.

The packages were built and collected correctly - the log shows
Dapper.AOT.1.1.0.nupkg and Dapper.Advisor.1.1.0.nupkg - but
actions/upload-artifact excludes hidden files by default, and `.nupkgs` is a
dot-directory, so the upload matched nothing and only warned. That would have cost
us the "packages survive a failed push" guarantee precisely when it mattered.

Dropped the dot rather than setting include-hidden-files, so it does not depend on
an action input that could change again, and left a note so nobody tidies it back.

versionHeightOffset -3 -> -4, because this is another commit on main and the target
is still 1.1.0; simulated the squash to confirm (height 4, build 0, 1.1.0).

(add missed demo output files)

Fixup for net9 SDK build (#144)

* lib refresh and fixup

* more fixups

* add 9.0.x to yml and test setup

* test .net 8/9

fixup minor reported diagnostics (#101)

Try to prevent stack overflow scenario during parse #94 (#97)

* attempt (not entirely successful) to repro #94
* store and report errors in Parse

investigate and fix #86 (#87)

* minimal repro of #86

* handle top-level statements
(also: make the test pass on netfx)

Assorted SQL analyzer fixes (#82)

* fix #79

* fix #80; add new rule 243 for invalid datepart expressions

* groundwork for aggregate

* fix #81; add new rule DAP244 for mixing aggregate and non-aggregate data

add [BatchSize] and pass thru to multi-row execute (#76)

close *before* recycling - required for npgsql (#74)