Fix npm vulnerability

[xorye]

npm audit results in the following output:

    === npm audit security report ===                        
                                                                                
# Run  npm update terser-webpack-plugin --depth 2  to resolve 1 vulnerability
┌───────────────┬──────────────────────────────────────────────────────────────┐
│ Moderate      │ Cross-Site Scripting                                         │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Package       │ serialize-javascript                                         │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Dependency of │ webpack [dev]                                                │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ Path          │ webpack > terser-webpack-plugin > serialize-javascript       │
├───────────────┼──────────────────────────────────────────────────────────────┤
│ More info     │ https://npmjs.com/advisories/1426                            │
└───────────────┴──────────────────────────────────────────────────────────────┘


found 1 moderate severity vulnerability in 12267 scanned packages
  run `npm audit fix` to fix 1 of them.

The package-lock.json in this PR is the result of running npm audit fix

Signed-off-by: David Kwon dakwon@redhat.com