chore(deps): update deps and devDeps (#195)

update dependencies and devDependencies for better linting and
compatibilty with @loopback/cli

GH-194

## Description

Please include a summary of the change and which issue is fixed. Please
also include relevant motivation and context. List any dependencies that
are required for this change.

Fixes #194 

## Type of change

Please delete options that are not relevant.

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Intermediate change (work in progress)

## How Has This Been Tested ?

Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list any relevant details
for your test configuration

- [ ] Test A
- [ ] Test B

## Checklist:

- [ ] Performed a self-review of my own code
- [ ] npm test passes on your machine
- [ ] New tests added or existing tests modified to cover all changes
- [ ] Code conforms with the style guide
- [ ] API Documentation in code was updated

Author: sf-sahil-jassal