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:mime:20170907

Latest report for zaccolley/songkick.pink:
https://snyk.io/test/github/zaccolley/songkick.pink
zaccolley/songkick.pink,zaccolley/songkick.pink