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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-BABELTRAVERSE-5962462
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-7577916
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-7577917
- https://snyk.io/vuln/SNYK-JS-ELLIPTIC-7577918
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
- https://snyk.io/vuln/SNYK-JS-ANSIREGEX-1583908
- https://snyk.io/vuln/SNYK-JS-BRACES-6838727
- https://snyk.io/vuln/SNYK-JS-ES5EXT-6095076
- https://snyk.io/vuln/SNYK-JS-LODASH-6139239
- https://snyk.io/vuln/SNYK-JS-PRISMJS-1076581
- https://snyk.io/vuln/SNYK-JS-PRISMJS-1585202
- https://snyk.io/vuln/SNYK-JS-SEMVER-3247795
- https://snyk.io/vuln/SNYK-JS-SSRI-1246392
- https://snyk.io/vuln/SNYK-JS-LODASH-608086
- https://snyk.io/vuln/SNYK-JS-Y18N-1021887
- https://snyk.io/vuln/SNYK-JS-LODASH-1040724
- https://snyk.io/vuln/SNYK-JS-TAR-6476909
- https://snyk.io/vuln/SNYK-JS-JSON5-3182856
- https://snyk.io/vuln/SNYK-JS-TAR-1579147
- https://snyk.io/vuln/SNYK-JS-TAR-1579152
- https://snyk.io/vuln/SNYK-JS-TAR-1579155
- https://snyk.io/vuln/SNYK-JS-PRISMJS-597628
- https://snyk.io/vuln/SNYK-JS-TAR-1536528
- https://snyk.io/vuln/SNYK-JS-TAR-1536531
- https://snyk.io/vuln/SNYK-JS-AJV-584908
- https://snyk.io/vuln/SNYK-JS-BROWSERIFYSIGN-6037026
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3043105
- https://snyk.io/vuln/SNYK-JS-BROWSERSLIST-1090194
- https://snyk.io/vuln/SNYK-JS-GLOBPARENT-1016905
- https://snyk.io/vuln/SNYK-JS-LODASH-1018905
- https://snyk.io/vuln/SNYK-JS-PATHPARSE-1077067
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1090595
- https://snyk.io/vuln/SNYK-JS-POSTCSS-1255640
- https://snyk.io/vuln/SNYK-JS-PRISMJS-1314893
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-2342118
- https://snyk.io/vuln/SNYK-JS-NODEFETCH-674311
- https://snyk.io/vuln/SNYK-JS-MINIMIST-2429795
- https://snyk.io/vuln/npm:debug:20170905
- https://snyk.io/vuln/SNYK-JS-RAMDA-1582370
- https://snyk.io/vuln/SNYK-JS-PRISMJS-2404333
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3042992
- https://snyk.io/vuln/SNYK-JS-LOADERUTILS-3105943
- https://snyk.io/vuln/SNYK-JS-TERSER-2806366
- https://snyk.io/vuln/SNYK-JS-TAR-1536758