Rollup plugin commonjs should be a dev dependency #2563

@P0lip / @mnaumanali94

Chore summary
Rollup plugin commonjs is now a normal dependency, and is installed if you add @stoplight/spectral-ruleset-bundler to a project.
This will result in some unnecessary dependencies that are installed.

Tasks

• Move @rollup/plugin-commonjs from devDependency to dependency

Additional context
Also fixes a Snyk issue of inflight
https://security.snyk.io/vuln/SNYK-JS-INFLIGHT-6095116
@stoplight/spectral-ruleset-bundler@1.5.2 › @rollup/plugin-commonjs@25.0.7 › glob@8.1.0 › inflight@1.0.6