refactor(HMR): rename module to path in context object

[vchimev]

The global.__hmrRefresh() function accepts a context object which consists of two properties:

• a type of the module
• a relative path of the module from the application root

PR Checklist

• The PR title follows our guidelines: https://github.com/NativeScript/NativeScript/blob/master/CONTRIBUTING.md#commit-messages.
• There is an issue for the bug/feature this PR is for. To avoid wasting your time, it's best to open a suggestion issue first and wait for approval before working on it.
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• All existing tests are passing: https://github.com/NativeScript/nativescript-dev-webpack/blob/master/CONTRIBUTING.md#testing-locally-by-running-e2e-tests
• Tests for the changes are included.

What is the current behavior?

The context object consists of type and module properties.

What is the new behavior?

The context object consists of type and path properties.