chore: use tsc to type-check the project

.editorconfig

@@ -12,6 +12,9 @@ trim_trailing_whitespace = true
 [package.json]
 indent_style = space
 
+[*.yml]
+indent_style = space
+
 [*.md]
 indent_style = space
 trim_trailing_whitespace = false

.github/workflows/test.yml

@@ -20,4 +20,5 @@ jobs:
         with:
           node-version: ${{ matrix.node }}
       - run: npm install
+      - run: npm check-types
       - run: npm test

index.js

@@ -1,9 +1,12 @@
 /**
  * @todo change these to their new locations (`prettier/plugins/<parser>`) with
- * the next major release.
+ * the next major release. (requires dropping Prettier 2.x support)
  */
+// @ts-expect-error
 const { parsers: babelParsers } = require('prettier/parser-babel');
+// @ts-expect-error
 const { parsers: htmlParsers } = require('prettier/parser-html');
+// @ts-expect-error
 const { parsers: typescriptParsers } = require('prettier/parser-typescript');
 
 const { organize } = require('./lib/organize');

lib/service-host.js

@@ -2,7 +2,7 @@ const { dirname } = require('path');
 const ts = require('typescript');
 const { findTsconfig } = require('./find-tsconfig');
 
-const { getCompilerOptions, getVueCompilerOptions } = require('./get-compiler-options');
+const { getCompilerOptions } = require('./get-compiler-options');
 
 /**
  * Create the most basic TS language service host for the given file to make import sorting work.

package.json

@@ -12,6 +12,7 @@
   "main": "index.js",
   "scripts": {
     "test": "ava --verbose",
+    "check-types": "tsc",
     "preversion": "npm test"
   },
   "files": [

tsconfig.json

@@ -3,7 +3,9 @@
 		"module": "commonjs",
 		"target": "es2015",
 		"checkJs": true,
-		"strict": true
+		"strict": true,
+		"skipLibCheck": true,
+		"noEmit": true
 	},
 	"vueCompilerOptions": { "plugins": ["@vue/language-plugin-pug"] }
 }