fix(content): Add support for error file (#467)

Co-authored-by: Sébastien Chopin <seb@nuxtjs.com>

Author: sasial-dev

src/tailwind.config.ts

@@ -12,6 +12,8 @@ export default ({ srcDir }) => ({
     `${srcDir}/plugins/**/*.{js,ts}`,
     `${srcDir}/App.{js,ts,vue}`,
     `${srcDir}/app.{js,ts,vue}`
+    `${srcDir}/Error.{js,ts,vue}`,
+    `${srcDir}/error.{js,ts,vue}`
     // TODO: This makes issues with import protection
     // Split in two files to avoid watching issues (https://github.com/nuxt-community/tailwindcss-module/issues/359)
     // `${rootDir}/nuxt.config.js`,