fix: sanitizing from and to options (postcss.config.js) (#260)

Author: evilebottnawi

lib/index.js

@@ -92,6 +92,11 @@ module.exports = function loader (css, map) {
 
     if (config.file) this.addDependency(config.file)
 
+    // Disable override `to` option from `postcss.config.js`
+    if (config.options.to) delete config.options.to
+    // Disable override `from` option from `postcss.config.js`
+    if (config.options.from) delete config.options.from
+
     let plugins = config.plugins || []
     let options = Object.assign({
       to: file,