Bump GitReader from 1.4.0 to 1.5.0 (#9)

Bumps [GitReader](https://github.com/kekyo/GitReader) from 1.4.0 to 1.5.0.
- [Commits](kekyo/GitReader@1.4.0...1.5.0)

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

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

src/GitReader.SourceGenerator/GitReader.SourceGenerator.csproj

@@ -30,8 +30,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.7.0" PrivateAssets="all" />
-    <PackageReference Include="GitReader" Version="1.4.0" PrivateAssets="all" GeneratePathProperty="true" />
-    <PackageReference Include="GitReader.Core" Version="1.4.0" PrivateAssets="all" GeneratePathProperty="true" />
+    <PackageReference Include="GitReader" Version="1.5.0" PrivateAssets="all" GeneratePathProperty="true" />
+    <PackageReference Include="GitReader.Core" Version="1.5.0" PrivateAssets="all" GeneratePathProperty="true" />
     <PackageReference Include="H.Generators.Extensions" Version="1.19.0" PrivateAssets="all" GeneratePathProperty="true" />
     <PackageReference Include="PolySharp" Version="1.13.2" PrivateAssets="all" />
   </ItemGroup>