fix: remove is_js dependency

[jplaisted]

Description of the change

https://github.com/rollbar/rollbar.js/pull/1111 bumped request-ip in an attempt to resolve a security vulnerability in one of its packagess (is_js). request-ip no longer depends on is_js, but it was not removed from this lock file. Not an npm expert, not sure why.

I ran the following command to remove is_js from the lock file (it is not specified in the package.json and is not transitively referenced; so it should not be in the lock file)

npm uninstall --lockfile-version 1 --save is_js

Proof it is not reachable:

➜  rollbar.js git:(master) npm ls is_js
rollbar@2.26.2 /Users/john.plaisted/workspace/rollbar.js
└── (empty)

Type of change

• [x] Bug fix (non-breaking change that fixes an issue)
• [ ] New feature (non-breaking change that adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] Maintenance
• [ ] New release

Related issues

https://github.com/rollbar/rollbar.js/pull/1111

Checklists

Development

• [x] Lint rules pass locally
• [x] The code changed/added as part of this pull request has been covered with tests
• [x] All tests related to the changed code pass in development

Code review

• [x] This pull request has a descriptive title and information useful to a reviewer. There may be a screenshot or screencast attached
• [ ] "Ready for review" label attached to the PR and reviewers assigned
• [ ] Issue from task tracker has a link to this pull request
• [ ] Changes have been reviewed by at least one other engineer

[farideliyev]

@waltjones, when do you plan release this fix?