[.NET] Update target frameworks (#265)

- Drop .NET 7 from test matrix
- Replace .NET 6 to .NET 8. because .NET 6 will reach End of Support on November 12, 2024
- Update C# language version to 12

- .NET 7 is out of support. https://devblogs.microsoft.com/dotnet/dotnet-7-end-of-support/
- .NET 6 (LTS) will reach End of Support on November 12, 2024 https://devblogs.microsoft.com/dotnet/dotnet-6-end-of-support/

.github/workflows/test-dotnet.yml

@@ -26,8 +26,6 @@ jobs:
       - uses: actions/setup-dotnet@v4
         with:
           dotnet-version: |
-            6.0.x
-            7.0.x
             8.0.x
       - run: dotnet test
         working-directory: dotnet

CHANGELOG.md

@@ -9,6 +9,7 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 ## [Unreleased]
 ### Changed
 - [Ruby] Upgraded messages support to permit up to v26
+- [.NET] Drop unsupported frameworks. Now supported target frameworks are .NET 8, .NET Framework 4.6.2, .NET Standard 2.0
 
 ## [29.0.0] - 2024-08-12
 ### Added

dotnet/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
 
   <PropertyGroup>
-    <LangVersion>11</LangVersion>
+    <LangVersion>12</LangVersion>
   </PropertyGroup>
 
 </Project>

dotnet/Gherkin.Specs/Gherkin.Specs.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net8.0;net7.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <OutputType>Exe</OutputType>
     <StartupObject>Gherkin.Specs.CLI.Program</StartupObject>
   </PropertyGroup>

dotnet/Gherkin/Gherkin.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net6.0;netstandard2.0;net462</TargetFrameworks>
+    <TargetFrameworks>net8.0;netstandard2.0;net462</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <NoWarn>1591</NoWarn>
     <Deterministic Condition="'$(Configuration)' == 'Release'">false</Deterministic>

dotnet/Makefile

@@ -42,10 +42,10 @@ clean: ## Remove all build artifacts and files generated by the acceptance tests
 
 acceptance: .built $(TOKENS) $(ASTS) $(PICKLES) $(ERRORS) $(SOURCES) ## Build acceptance test dir and compare results with reference
 
-.built: $(SOURCE_FILES) Gherkin.Specs/bin/Debug/net6.0/Gherkin.Specs.dll
+.built: $(SOURCE_FILES) Gherkin.Specs/bin/Debug/net8.0/Gherkin.Specs.dll
 	touch $@
 
-Gherkin.Specs/bin/Debug/net6.0/Gherkin.Specs.dll:
+Gherkin.Specs/bin/Debug/net8.0/Gherkin.Specs.dll:
 	dotnet test
 
 $(GHERKIN_PARSER): $(GHERKIN_RAZOR) ../gherkin.berp

dotnet/bin/gherkin

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -euf -o pipefail
 
-arch="net6.0"
+arch="net8.0"
 
 dotnet "Gherkin.Specs/bin/Debug/$arch/Gherkin.Specs.dll" events "${@:1}"

dotnet/bin/gherkin-generate-tokens

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -euf -o pipefail
 
-arch="net6.0"
+arch="net8.0"
 
 dotnet "Gherkin.Specs/bin/Debug/$arch/Gherkin.Specs.dll" tokens "${@:1}"