chore: Migrate to github actions for CI.

.github/actions/ci/action.yml

@@ -0,0 +1,33 @@
+name: CI
+description: Runs CI for the .NET Server SDK
+inputs:
+  sdk:
+    description: 'The dotnet SDK to use.'
+    required: false
+    default: '9'
+  target_test_framework:
+    description: 'The target test framework to use.'
+    required: false
+    default: 'net9.0'
+
+runs:
+  using: composite
+  steps:
+    - uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: ${{ inputs.sdk }}
+    - run: dotnet restore src/LaunchDarkly.Cache
+      env:
+        BUILDFRAMEWORKS: netstandard2.1
+        TESTFRAMEWORKS: ${{ inputs.target_test_framework }}
+      shell: bash
+    - run: dotnet build src/LaunchDarkly.Cache
+      env:
+        BUILDFRAMEWORKS: netstandard2.1
+        TESTFRAMEWORKS: ${{ inputs.target_test_framework }}
+      shell: bash
+    - run: dotnet test test/LaunchDarkly.Cache.Tests
+      env:
+        BUILDFRAMEWORKS: netstandard2.1
+        TESTFRAMEWORKS: ${{ inputs.target_test_framework }}
+      shell: bash

.github/workflows/ci.yml

@@ -0,0 +1,27 @@
+name: Build and Test
+
+on:
+  push:
+    branches: [main, 'feat/**']
+    paths-ignore:
+      - '**.md' #Do not need to run CI for markdown changes.
+  pull_request:
+    branches: [main, 'feat/**']
+    paths-ignore:
+      - '**.md'
+  workflow_call:
+
+jobs:
+  build-test-linux:
+    strategy:
+      matrix:
+          os: ['ubuntu-latest', 'windows-latest']
+          dotnet: [{sdk: '8.x', test-framework: 'net8.0'}, {sdk: '9.x', test-framework: 'net9.0'}]
+    runs-on: ${{ matrix.os }}
+    name: Build ${{ matrix.os }} - ${{ matrix.dotnet.sdk }} - ${{ matrix.dotnet.test-framework }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ./.github/actions/ci
+        with:
+          sdk: ${{ matrix.dotnet.sdk }}
+          target_test_framework: ${{ matrix.dotnet.test-framework }}

README.md

@@ -1,7 +1,5 @@
 # LaunchDarkly Caching Tools for .NET
 
-[![CircleCI](https://circleci.com/gh/launchdarkly/dotnet-cache.svg?style=svg)](https://circleci.com/gh/launchdarkly/dotnet-cache)
-
 This library provides a caching abstraction used by other LaunchDarkly .NET assemblies. .NET provides several caching tools, but their functionality differs between .NET Framework and .NET Standard and does not include some desired behaviors.
 
 ## Supported .NET versions

test/LaunchDarkly.Cache.Tests/LaunchDarkly.Cache.Tests.csproj

@@ -6,7 +6,7 @@
       SDKs which do not consider "net5.0" to be a valid target framework that can be
       referenced in a project file.
     -->
-    <TestFrameworks Condition="'$(TESTFRAMEWORKS)' == ''">netcoreapp2.1;net5.0;net6.0;net452</TestFrameworks>
+    <TestFrameworks Condition="'$(TESTFRAMEWORKS)' == ''">net8.0;net9.0</TestFrameworks>
     <TargetFrameworks>$(TESTFRAMEWORKS)</TargetFrameworks>
     <IsPackable>false</IsPackable>
   </PropertyGroup>