Fix versioning

ShinyMediator.sln

@@ -11,7 +11,6 @@ EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution", "Solution", "{F3E00A65-78B7-4972-B5F2-168B8832D994}"
 	ProjectSection(SolutionItems) = preProject
 		readme.md = readme.md
-		version.json = version.json
 		.github\workflows\build.yml = .github\workflows\build.yml
 		.github\ISSUE_TEMPLATE\bug_report.yml = .github\ISSUE_TEMPLATE\bug_report.yml
 		.github\ISSUE_TEMPLATE\config.yml = .github\ISSUE_TEMPLATE\config.yml
@@ -20,6 +19,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution", "Solution", "{F3
 		src\Directory.build.targets = src\Directory.build.targets
 		src\nuget.txt = src\nuget.txt
 		Build.slnf = Build.slnf
+		version.json = version.json
 	EndProjectSection
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Shiny.Mediator.SourceGenerators", "src\Shiny.Mediator.SourceGenerators\Shiny.Mediator.SourceGenerators.csproj", "{DC52EE6B-CE7D-4711-9BF9-A174E20B3D77}"

version.json

@@ -0,0 +1,12 @@
+{
+    "$schema": "https://raw.githubusercontent.com/dotnet/Nerdbank.GitVersioning/main/src/NerdBank.GitVersioning/version.schema.json",
+    "version": "1.9.0-beta",
+    "assemblyVersion": {
+        "precision": "revision"
+    },
+    "publicReleaseRefSpec": [
+        "^refs/heads/main$",
+        "^refs/tags/v\\d+\\.\\d+",
+        "^refs/tags/v\\d+\\.\\d+\\.\\d+"
+    ]
+}