Bump coverlet.collector from 3.1.1 to 3.1.2

Bumps [coverlet.collector](https://github.com/coverlet-coverage/coverlet) from 3.1.1 to 3.1.2.
- [Release notes](https://github.com/coverlet-coverage/coverlet/releases)
- [Commits](https://github.com/coverlet-coverage/coverlet/commits)

---
updated-dependencies:
- dependency-name: coverlet.collector
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

src/Humanizer.Tests/Humanizer.Tests.csproj

@@ -8,7 +8,7 @@
     <DefineConstants>$(DefineConstants);NETFX_CORE</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="coverlet.collector" Version="3.1.1" PrivateAssets="all" />
+    <PackageReference Include="coverlet.collector" Version="3.1.2" PrivateAssets="all" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.1.0" />