Scala Native 0.5 and multi-threading

This release updates Scala Native to 0.5 and fixes the connection pool implementation to allow multiple threads to multiplex over single postgres connection (true connection pooling is not available yet).

Usage of multi-threading is detected at linktime, and we fallback to a simpler single-threaded implementation if necessary.

This has no user-facing changes.

What's Changed

• Update bindgen-sbt-plugin to 0.0.23 by @indoorvivants-steward in #98
• Update upickle to 3.1.3 by @indoorvivants-steward in #101
• Update os-lib to 0.9.2 by @indoorvivants-steward in #100
• Update junit-plugin, junit-runtime, ... to 0.4.16 by @indoorvivants-steward in #102
• Update sbt to 1.9.8 by @indoorvivants-steward in #103
• Update sbt-mdoc to 2.3.8 by @indoorvivants-steward in #105
• Update scalafmt-core to 3.7.17 by @indoorvivants-steward in #106
• Update os-lib to 0.9.3 by @indoorvivants-steward in #108
• Update upickle to 3.1.4 by @indoorvivants-steward in #110
• Update junit-plugin, junit-runtime, ... to 0.4.17 by @indoorvivants-steward in #111
• Update bindgen-sbt-plugin to 0.0.24 by @indoorvivants-steward in #113
• Update bindgen-sbt-plugin to 0.1.0 by @indoorvivants-steward in #115
• Update munit to 1.0.0-M11 by @indoorvivants-steward in #114
• Update sbt-mdoc to 2.5.2 by @indoorvivants-steward in #109
• Update upickle to 3.2.0 by @indoorvivants-steward in #116
• Update scalafmt-core to 3.8.0 by @indoorvivants-steward in #117
• Update sbt to 1.9.9 by @indoorvivants-steward in #118
• SN 0.5 by @keynmol in #119
• Fix multi-threaded pool with a semaphore by @keynmol in #120

Full Changelog: v0.0.6...v0.1.0