[Build] Set rollForwardOnNoCandidateFx in APITool for using .NETCore 3.0 runtime

diff --git a/tools/bin/APITool.runtimeconfig.json b/tools/bin/APITool.runtimeconfig.json
index 7539019..62f4b3c 100644 (file)
--- a/tools/bin/APITool.runtimeconfig.json
+++ b/tools/bin/APITool.runtimeconfig.json
@@ -4,6 +4,7 @@
     "framework": {
       "name": "Microsoft.NETCore.App",
       "version": "2.0.0"
-    }
+    },
+    "rollForwardOnNoCandidateFx": 2
   }
-}
\ No newline at end of file
+}