If version is specified it should check version and uninstall if differs

[devlead]

Currently if I change
#tool "dotnet:https://api.nuget.org/v3/index.json?package=GitVersion.Tool&version=4.0.1-beta1-53"
to
#tool "dotnet:https://api.nuget.org/v3/index.json?package=GitVersion.Tool&version=4.0.1-beta1-58"

It won't use the new version, and that's not what's expected when pinning a version.

Directory structure is

tools\.store\gitversion.tool\{version}

So if differs one should be able to run
dotnet tool uninstall --tool-path .\tools\ GitVersion.Tool and then install.

dotnet tool uninstall --tool-path .\tools\ GitVersion.Tool 
+ Tool 'gitversion.tool' (version '4.0.1-beta1-53') was successfully uninstalled.

dotnet tool install --tool-path .\tools\ --version="4.0.1-beta1-58" GitVersion.Tool
+ You can invoke the tool using the following command: dotnet-gitversion
+ Tool 'gitversion.tool' (version '4.0.1-beta1-58') was successfully installed.

Code for reference:

Cake.DotNetTool.Module/Source/Cake.DotNetTool.Module/DotNetToolPackageInstaller.cs

Lines 114 to 117 in 1bbd2aa

	if(installedToolNames.Contains(package.Package.ToLowerInvariant()))
	{
	_log.Information("Tool {0} is already installed, so nothing to do here.", package.Package);
	}