chore: lint all template files (#4130)

lib/app/.eslintignore

@@ -0,0 +1,3 @@
+dist
+_nuxt
+*.json

package.json

@@ -9,6 +9,7 @@
     "dev": "yarn build --watch",
     "coverage": "codecov",
     "lint": "eslint --ext .js,.mjs,.vue .",
+    "lint:app": "eslint-multiplexer eslint --ignore-path lib/app/.eslintignore 'test/fixtures/!(missing-plugin)/.nuxt!(-dev)/**' | eslint-multiplexer -b",
     "nuxt": "node -r esm ./packages/cli/bin/nuxt.js",
     "test": "yarn test:fixtures && yarn test:unit",
     "test:fixtures": "jest test/fixtures",
@@ -31,6 +32,7 @@
     "cross-spawn": "^6.0.5",
     "eslint": "^5.7.0",
     "eslint-config-standard": "^12.0.0",
+    "eslint-multiplexer": "^1.0.2",
     "eslint-plugin-import": "^2.14.0",
     "eslint-plugin-jest": "^21.25.1",
     "eslint-plugin-node": "^7.0.1",

yarn.lock

@@ -4004,6 +4004,15 @@ eslint-module-utils@^2.2.0:
     debug "^2.6.8"
     pkg-dir "^1.0.0"
 
+eslint-multiplexer@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.npmjs.org/eslint-multiplexer/-/eslint-multiplexer-1.0.2.tgz#8cce47bbeac7f448617b714245860aa6e5c38941"
+  integrity sha512-H8fIwGwrydqyGs9n10VPr5zt2PPYsAiRrDKcWtE4aw1w+JGzj+DBYc4wvp+ptGwGi/4YCkjsmIkDZQrGgv5axg==
+  dependencies:
+    cross-spawn "^6.0.5"
+    minimist "^1.2.0"
+    minimist-options "^3.0.2"
+
 eslint-plugin-es@^1.3.1:
   version "1.3.1"
   resolved "https://registry.npmjs.org/eslint-plugin-es/-/eslint-plugin-es-1.3.1.tgz#5acb2565db4434803d1d46a9b4cbc94b345bd028"
@@ -6890,7 +6899,7 @@ minimatch@^3.0.0, minimatch@^3.0.2, minimatch@^3.0.3, minimatch@^3.0.4:
   dependencies:
     brace-expansion "^1.1.7"
 
-minimist-options@^3.0.1:
+minimist-options@^3.0.1, minimist-options@^3.0.2:
   version "3.0.2"
   resolved "https://registry.npmjs.org/minimist-options/-/minimist-options-3.0.2.tgz#fba4c8191339e13ecf4d61beb03f070103f3d954"
   integrity sha512-FyBrT/d0d4+uiZRbqznPXqw3IpZZG3gl3wKWiX784FycUKVwBt0uLBFkQrtE4tZOrgo78nZp2jnKz3L65T5LdQ==