feat: Disallow Composition API
BREAKING CHANGE: This disallows the Composition API. Since we're still using Vue 2.6 which doesn't support it anyway, this should have no effect. Once we upgrade to Vue 2.7, we can consider relaxing this rule as we develop guidelines around its usage.
Se https://eslint.vuejs.org/rules/component-api-style.html for details about the rule, and #52 (closed) for discussion.
Edited by Mark Florian