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

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/npm:eslint:20180222

Latest report for doubleu23/tailored-keymapping:
https://snyk.io/test/github/doubleu23/tailored-keymapping
DoubleU23/tailored-keymapping