Bump DiffEngine from 19.2.0 to 19.3.0

---
updated-dependencies:
- dependency-name: DiffEngine
  dependency-version: 19.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -7,7 +7,7 @@
     <PackageVersion Include="Argon" Version="0.34.0" />
     <PackageVersion Include="Argon.FSharp" Version="0.34.0" />
     <PackageVersion Include="BenchmarkDotNet" Version="0.15.8" />
-    <PackageVersion Include="DiffEngine" Version="19.2.0" />
+    <PackageVersion Include="DiffEngine" Version="19.3.0" />
     <PackageVersion Include="Expecto" Version="11.1.0" />
     <PackageVersion Include="Fixie" Version="4.2.0" />
     <PackageVersion Include="Fixie.TestAdapter" Version="4.2.0" />