DotNetWorkQueue v0.15.0

What's Changed

• docs: say why the schema version read is safe, not just that it is by @blehnen in #385
• ci: the concurrent-build risk has been observed, and the pool grew (#368) by @blehnen in #386
• ci: drop the restore stagger, whose reason no longer applies (#384) by @blehnen in #387
• test: use the assertions that name what they compare by @blehnen in #388
• test: share the PostgreSQL schema-test queue harness (#382) by @blehnen in #389
• refactor: drop the four default interface members (#252) by @blehnen in #390
• Build for netstandard2.0 so .NET Framework can use the library again (#252) by @blehnen in #391
• Run the packaged library on .NET Framework (#392) by @blehnen in #393
• Changelog cleanup and release 0.15.0 by @blehnen in #394

Full Changelog: v0.14.0...v0.15.0