Audit packages

[jozefizso]

npm audit report

json-schema  <0.4.0
Severity: critical
json-schema is vulnerable to Prototype Pollution - https://github.com/advisories/GHSA-896r-f27r-55mw
fix available via `npm audit fix`
node_modules/json-schema
  jsprim  0.3.0 - 1.4.1 || 2.0.0 - 2.0.1
  Depends on vulnerable versions of json-schema
  node_modules/jsprim

path-parse  <1.0.7
Severity: moderate
Regular Expression Denial of Service in path-parse - https://github.com/advisories/GHSA-hj48-42vr-x3v9
fix available via `npm audit fix`
node_modules/resolve/node_modules/path-parse

qs  6.5.0 - 6.5.2
Severity: high
qs vulnerable to Prototype Pollution - https://github.com/advisories/GHSA-hrpp-h998-j3pp
fix available via `npm audit fix`
node_modules/qs

4 vulnerabilities (1 moderate, 1 high, 2 critical)

[jozefizso]

Fixed by #121