fix: package.json & .snyk to reduce vulnerabilities
fix: package.json & .snyk to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-LIBNMAP-72551


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
- https://snyk.io/vuln/npm:lodash:20180130
- https://snyk.io/vuln/npm:minimatch:20160620
- https://snyk.io/vuln/npm:uglify-js:20151024
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