Bump coverlet.collector from 3.0.3 to 3.1.0 (#11)

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 3.0.3 to 3.1.0.
<details>
<summary>Release notes</summary>

*Sourced from [coverlet.collector's releases](https://github.com/coverlet-coverage/coverlet/releases).*

> ## v3.1.0
> * 141 adds performance improvements to coverage tracker for multi-threaded scenarios
> * a189fc26ea35b8ad77bd3be2bceac5c2996149a8 replaces Jil with JSON.NET for JSON serialization
> * [#147](coverlet-coverage/coverlet#147) adds support for instrumenting constructors
> * 4efea75e7c92e01652eb6c1c465ae1bcf9e56e6b ensures output filenames have extensions if non is specified
> * [#154](coverlet-coverage/coverlet#154) makes enumeration based MSBuild properties case insensitive
> * [#164](coverlet-coverage/coverlet#164) adds support for specifying include filters
> * [#169](coverlet-coverage/coverlet#169) adds slight improvement for coverage tracking performance
</details>
<details>
<summary>Commits</summary>

- See full diff in [compare view](https://github.com/coverlet-coverage/coverlet/commits/v3.1.0)
</details>

<br />

Reviewed-on: https://gitea.dysnomia.studio/elanis/portfolio/pulls/11
Co-authored-by: elanis <elanis@noreply.example.org>
Co-committed-by: elanis <elanis@noreply.example.org>

Portfolio.Test/Portfolio.Test.csproj

@@ -21,7 +21,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="coverlet.collector" Version="3.0.3">
+    <PackageReference Include="coverlet.collector" Version="3.1.0">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>