fix: Relax common dependency (#44)

Author: jsonbailey

src/LaunchDarkly.InternalSdk/LaunchDarkly.InternalSdk.csproj

@@ -32,7 +32,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="LaunchDarkly.CommonSdk" Version="7.0.0" />
+    <PackageReference Include="LaunchDarkly.CommonSdk" Version="[7.1.0,8.0.0)" />
     <PackageReference Include="LaunchDarkly.Logging" Version="[2.0.0,3.0.0)" />
   </ItemGroup>