fix: package.json & package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-HAWK-6969142
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
- https://snyk.io/vuln/SNYK-JS-LODASH-6139239
- https://snyk.io/vuln/SNYK-JS-QS-3153490
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-LODASH-450202
- https://snyk.io/vuln/SNYK-JS-LODASH-608086
- https://snyk.io/vuln/SNYK-JS-LODASH-73638
- https://snyk.io/vuln/SNYK-JS-LODASHMERGEWITH-174136
- https://snyk.io/vuln/SNYK-JS-Y18N-1021887
- https://snyk.io/vuln/SNYK-JS-LODASH-1040724
- https://snyk.io/vuln/SNYK-JS-JSONSCHEMA-1920922
- https://snyk.io/vuln/npm:hoek:20180212
- https://snyk.io/vuln/SNYK-JS-AJV-584908
- https://snyk.io/vuln/SNYK-JS-MINIMIST-559764
- https://snyk.io/vuln/SNYK-JS-YARGSPARSER-560381
- https://snyk.io/vuln/SNYK-JS-HOSTEDGITINFO-1088355
- https://snyk.io/vuln/SNYK-JS-LODASH-1018905
- https://snyk.io/vuln/SNYK-JS-HAWK-2808852
- https://snyk.io/vuln/SNYK-JS-FSTREAM-174725
- https://snyk.io/vuln/npm:extend:20180424
- https://snyk.io/vuln/SNYK-JS-LODASH-73639
- https://snyk.io/vuln/SNYK-JS-MINIMIST-2429795
- https://snyk.io/vuln/SNYK-JS-MINIMATCH-3050818