fix: Distribute schema with package

Author: joshwiens

package.json

@@ -6,7 +6,8 @@
   "license": "MIT",
   "main": "dist/cjs.js",
   "files": [
-    "dist"
+    "dist",
+    "schema"
   ],
   "scripts": {
     "start": "npm run build -- -w",

src/schema/loader.json renamed to schema/loader.json

@@ -26,7 +26,7 @@ class ExtractTextPlugin {
     if (isString(options)) {
       options = { filename: options };
     } else {
-      validateOptions(path.resolve(__dirname, './schema/plugin.json'), options, 'Extract Text Plugin');
+      validateOptions(path.resolve(__dirname, '../schema/plugin.json'), options, 'Extract Text Plugin');
     }
     this.filename = options.filename;
     this.id = options.id != null ? options.id : ++nextId;
@@ -88,7 +88,7 @@ class ExtractTextPlugin {
     if (Array.isArray(options) || isString(options) || typeof options.options === 'object' || typeof options.query === 'object') {
       options = { use: options };
     } else {
-      validateOptions(path.resolve(__dirname, './schema/loader.json'), options, 'Extract Text Plugin (Loader)');
+      validateOptions(path.resolve(__dirname, '../schema/loader.json'), options, 'Extract Text Plugin (Loader)');
     }
     let loader = options.use;
     let before = options.fallback || [];