fix version number replace, grrrr

Author: mythz

build/build.proj

@@ -80,7 +80,7 @@
       </RegexTransform>
       <!--Update Min Dependency Version -->
       <RegexTransform Include="$(NuGetPackageDir)/**/*.nuspec">
-        <Find>version="4\.0(\.\d+)?"</Find>
+        <Find>version="4\.5(\.\d+)?"</Find>
         <ReplaceWith>version="$(PackageVersion)"</ReplaceWith>
       </RegexTransform>
     </ItemGroup>