Add VS Solution file fix

2019.3.12 introduced an issue for cross asmdef references within visual studio. The added AssetPostprocessor corrects the issue.

Assets/Fungus/Scripts/Editor/SolutionFileFixer.cs

@@ -0,0 +1,17 @@
+using UnityEditor;
+
+#if UNITY_2019_3_12
+namespace Fungus.EditorUtils
+{
+    //fix for a bug introduced in unity 2019.3.12 that prevents cross asmdef references from showing
+    //  doco and code hinting correctly in vs2019
+    // https://forum.unity.com/threads/2019-3-12f1-build-errors.880312/
+    public class SolutionFileFixer : AssetPostprocessor
+    {
+        private static string OnGeneratedCSProject(string path, string content)
+        {
+            return content.Replace("<ReferenceOutputAssembly>false</ReferenceOutputAssembly>", "<ReferenceOutputAssembly>true</ReferenceOutputAssembly>");
+        }
+    }
+}
+#endif

Assets/Fungus/Scripts/Editor/SolutionFileFixer.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 016e0ddcf2101ba4a8d50bf1f440f5c5
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: