Bump Verify and Verify.NUnit (#337)

Bumps Verify from 31.16.3 to 31.18.0
Bumps Verify.NUnit from 31.16.3 to 31.18.0

---
updated-dependencies:
- dependency-name: Verify
  dependency-version: 31.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Verify.NUnit
  dependency-version: 31.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

src/Directory.Packages.props

@@ -13,11 +13,11 @@
     <PackageVersion Include="ProjectDefaults" Version="1.0.174" />
     <PackageVersion Include="Polyfill" Version="10.7.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageVersion Include="Verify.NUnit" Version="31.16.3" />
+    <PackageVersion Include="Verify.NUnit" Version="31.18.0" />
     <PackageVersion Include="Argon" Version="0.34.0" />
     <PackageVersion Include="DiffEngine" Version="19.2.0" />
     <PackageVersion Include="EmptyFiles" Version="8.18.1" />
     <PackageVersion Include="SimpleInfoName" Version="3.2.0" />
-    <PackageVersion Include="Verify" Version="31.16.3" />
+    <PackageVersion Include="Verify" Version="31.18.0" />
   </ItemGroup>
 </Project>