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-MINIMIST-559764
- https://snyk.io/vuln/npm:hoek:20180212
- https://snyk.io/vuln/npm:qs:20170213
- https://snyk.io/vuln/npm:tough-cookie:20160722
- https://snyk.io/vuln/npm:tough-cookie:20170905
- https://snyk.io/vuln/npm:tunnel-agent:20170305


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
yuanliwei/generate