v0.12.8: Support enumeration in path parameters

Fixes a bug that would prevent routing logic to match requests if the input contained a path-parameter enumeration

What's Changed

• Update smithy-aws-traits, smithy-build, ... to 1.19.0 by @scala-steward in #149
• Update scala-collection-compat to 2.7.0 by @scala-steward in #145
• Update fs2-core to 3.2.6 by @scala-steward in #154
• Allow enum as path param by @daddykotex in #155

Full Changelog: v0.12.7...v0.12.8