Bump version to 3.0.0 (#24)

Author: Dragorn421

Z64Utils/Z64Utils.csproj

@@ -11,7 +11,7 @@
         Use `dotnet build '-'-version-suffix ...` to override the version suffix when building
         a release. (may need rebuilding from scratch)
     -->
-    <VersionPrefix>2.2.1</VersionPrefix>
+    <VersionPrefix>3.0.0</VersionPrefix>
     <VersionSuffix>dev</VersionSuffix>
 
     <WarningsAsErrors>CS8600;CS8602;CS8603;CS8604;CS8605;CS8618;CS8619;CS8622;CS8625</WarningsAsErrors>