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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-JQUERY-174006
- https://snyk.io/vuln/SNYK-JS-JQUERY-565129
- https://snyk.io/vuln/SNYK-JS-JQUERY-567880
- https://snyk.io/vuln/SNYK-JS-LODASH-450202
- https://snyk.io/vuln/SNYK-JS-LODASH-73638
- https://snyk.io/vuln/SNYK-JS-LODASH-73639


The following vulnerabilities are fixed with a Snyk patch:
- https://snyk.io/vuln/SNYK-JS-LODASH-567746
- https://snyk.io/vuln/npm:extend:20180424
kfiku/piGit,kfiku/piGit,kfiku/piGit