Ignore handlers that do not follow a path pattern

[HyperBrain]

What did you implement:

Closes #193

How did you implement it:

Ignore handlers in automatic handler resolution that do not follow the handler.func pattern.
This is the case for all Google handlers.

How can we verify it:

Use Serverless with the google-cloudfunctions plugin. Package the project and see if it succeeds.

Todos:

• Write tests
• Write documentation
• Fix linting errors (not yet implemented)
• Make sure code coverage hasn't dropped (not yet implemented)
• Provide verification config / commands / resources
• Enable "Allow edits from maintainers" for this PR
• Update the messages below

Is this ready for review?: YES
Is it a breaking change?: NO

[HyperBrain]

@huysamen Can you check with this branch, if it works for you now?

Just reference the plugin as follows in your package.json:

"serverless-webpack": "github:elastic-coders/serverless-webpack#handle-entry-detection-for-malformed-handlers"

Please let me know and I will merge the fix and release a 2.2.1 bugfix version

[huysamen]

@HyperBrain yeah that seems to have fixed the issue, thanks!