remove need for dynamic access to package.json to obtain lib version (util.js)

[aappddeevv]

When trying to add node-adal into a larger bundle, the runtime dependency on a package.json causes bundling schemes motivate a runtime failure since the package.json cannot be accessed from the larger bundle.

[akos-sebestyen]

👍 Please!

[morrisjn]

I would also love this fix! Thank you.

[tomflenniken]

The recommended approach for Azure functions is to webpack the deployed files (see https://github.com/Azure/azure-functions-pack). Adal-node is incompatible with this approach and requires us to include the adal-node packages as a separate node_module. This causes significant performance degradation (cold start times go from 5-7 seconds to ~30).
Azure/azure-functions-host#298

[akos-sebestyen]

@tomflenniken we had the exact same issue. See this workaround.
#165

[lovemaths]

@akos-sebestyen Thank you for your PR, we will do a new release this week with your PR.