chore(deps): bump github.com/pointfreeco/swift-snapshot-testing (#719)

Bumps [github.com/pointfreeco/swift-snapshot-testing](https://github.com/pointfreeco/swift-snapshot-testing) from 1.18.3 to 1.18.4.
- [Release notes](https://github.com/pointfreeco/swift-snapshot-testing/releases)
- [Commits](pointfreeco/swift-snapshot-testing@1.18.3...1.18.4)

---
updated-dependencies:
- dependency-name: github.com/pointfreeco/swift-snapshot-testing
  dependency-version: 1.18.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Package.resolved

@@ -68,8 +68,8 @@
       "kind" : "remoteSourceControl",
       "location" : "https://github.com/pointfreeco/swift-snapshot-testing",
       "state" : {
-        "revision" : "1be8144023c367c5de701a6313ed29a3a10bf59b",
-        "version" : "1.18.3"
+        "revision" : "37230a37e83f1b7023be08e1b1a2603fcb1567fb",
+        "version" : "1.18.4"
       }
     },
     {