Options to control which functions will be build with webpack and whi…

[quassnoi]

…ch will not

closes #255

What did you implement:

Closes #255

How did you implement it:

I've added the configuration options to include and exclude functions that will be built using Webpack; made the --function option support multiple entries.

How can we verify it:

• Create a serverless-webpack configuration with three functions
• Add one of those functions under custom / webpack / excludeFunctions, make sure Webpack does not try to build that function
• Add one of those functions under custom / webpack / includeFunctions, make sure Webpack does not try to build functions other than that
• Run serverless webpack --function func1 --function func2, make sure only Webpack only tries to build func1 and func2

Todos:

• Write tests
• Write documentation
• Fix linting errors
• Make sure code coverage hasn't dropped
• 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

[quassnoi]

@HyperBrain @thenikso hey guys, mind reviewing this?

We're using this feature in our scenario, would have been nice to have the real package instead of a fork in our package.json

Thanks!

[quassnoi]

@ceilfors @franciscocpg @HyperBrain @MartinRisk @nathanchapman @rdsedmundo hey guys, are you still supporting this project?

[BerkhanBerkdemir]

Looks good to me but somebody from the organization should leave a review...

[nathanchapman]

Awesome work!

[j0k3r]

@quassnoi Could you rebase against the master and fix conflicts? Thanks 🙏