Merge pull request #445 from notion-dotnet/release/4.3.0

Bump version to 4.3.0

Author: KoditkarVedant

Src/Notion.Client/Notion.Client.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <VersionPrefix>4.2.0-preview</VersionPrefix>
+    <VersionPrefix>4.3.0-preview</VersionPrefix>
     <TargetFramework>netstandard2.0</TargetFramework>
     <LangVersion>9.0</LangVersion>