vectorcastTestExplorer.configurationLocation should support ${workspaceFolder}

[aytey]

In .vscode/settings.json, rather than:

{
    "C_Cpp.default.compilerPath": "/usr/bin/g++",
    "vectorcastTestExplorer.build.enableCodedTesting": true,
    "vectorcastTestExplorer.configurationLocation": "/home/avj/clones/ChaosKit/vcast/CCAST_.CFG"
}

I'd like:

{
    "C_Cpp.default.compilerPath": "/usr/bin/g++",
    "vectorcastTestExplorer.build.enableCodedTesting": true,
    "vectorcastTestExplorer.configurationLocation": "${workspaceFolder}/vcast/CCAST_.CFG"
}

[aytey]

https://www.npmjs.com/package/vscode-variables