Use serverless version installed by package.json

[bangbay-bluetiger]

Description

Our apps are set up to use a global version of serverless. Since there can only be one version of a package installed globally, it's causing apps to fail if they're not on the same version. Particularly with serverless, there doesn't seem to be a reason to use a global version when the apps install a version of serverless locally. This PR:

• Updates ./run local to use the local serverless binary
• Removes global installation of serverless

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How to test

1. Run ./run local
2. App should boot normally

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Pre-review checklist

• I have added thorough tests, if necessary
• I have updated relevant documentation, if necessary
• I have performed a self-review of my code
• I have manually tested this PR in the deployed cloud environment

[codeclimate]

Code Climate has analyzed commit 6ff8ac5 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (90% is the threshold).

This pull request will bring the total coverage in the repository to 96.7% (0.0% change).

View more on Code Climate.

[JonHolman]

We can do this, but I will be opening a PR very soon (maybe today, at least tomorrow morning to undo this)