Please make "targets" optional

[eric-914]

I've just discovered that these two options are incompatible with each other:

%msbuild% /t:Publish /p:DeployOnBuild=true
==> There is a circular dependency in the target dependency graph involving target "Publish"

This works:
%msbuild% /t:Publish

And this works:
%msbuild% /p:DeployOnBuild=true /p:PublishProfile=MyProfile.pubxml

Notice that the /target option isn't part of this. But msbuild-command-builder.js (line 11) requires a targets option, and will error if undefined.

I have found this as a workaround for the time being:
%msbuild% /t:Build /p:DeployOnBuild=true /p:PublishProfile=MyProfile.pubxml

The fix, I believe, is to change line 11 to:
if (options.targets) { args.push('/target:' + options.targets.join(';')); }