feat: Require OpenFeature SDK 1.5 or greater. (#31)

Author: kinyoklion

src/LaunchDarkly.OpenFeature.ServerProvider/LaunchDarkly.OpenFeature.ServerProvider.csproj

@@ -41,7 +41,7 @@
 
   <ItemGroup>
     <PackageReference Include="LaunchDarkly.ServerSdk" Version="[8.1.0,9.0)" />
-    <PackageReference Include="OpenFeature" Version="[1.4.0, 2.0.0)" />
+    <PackageReference Include="OpenFeature" Version="[1.5.0, 2.0.0)" />
   </ItemGroup>
 
   <PropertyGroup>

test/LaunchDarkly.OpenFeature.ServerProvider.Tests/LaunchDarkly.OpenFeature.ServerProvider.Tests.csproj

@@ -32,7 +32,7 @@
         <PackageReference Include="LaunchDarkly.ServerSdk" Version="8.1.0" />
         <PackageReference Include="LaunchDarkly.TestHelpers" Version="2.0.0" />
         <PackageReference Include="Moq" Version="4.8.1" />
-        <PackageReference Include="OpenFeature" Version="1.*" />
+        <PackageReference Include="OpenFeature" Version="1.5" />
     </ItemGroup>
 
     <ItemGroup>