message: feat: removes snyk readme template badge
  fixes oclif/oclif#69
diff: [![CircleCI](https://circleci.com/gh/<%= repository %>/tree/master.svg?style=shield)](https://circleci.com/gh/<%= repository %>/tree/master)
  [![Appveyor CI](https://ci.appveyor.com/api/projects/status/github/<%= repository %>?branch=master&svg=true)](https://ci.appveyor.com/project/<%= repository %>/branch/master)
  [![Codecov](https://codecov.io/gh/<%= repository %>/branch/master/graph/badge.svg)](https://codecov.io/gh/<%= repository %>)
  -[![Known Vulnerabilities](https://snyk.io/test/github/<%- repository %>/badge.svg)](https://snyk.io/test/github/<%- repository %>)
  [![Downloads/week](https://img.shields.io/npm/dw/<%= pjson.name %>.svg)](https://npmjs.org/package/<%= pjson.name %>)
  [![License](https://img.shields.io/npm/l/<%= pjson.name %>.svg)](https://github.com/<%= repository %>/blob/master/package.json)
  