Ensure options are passed to plugins

Author: JohnAlbin

index.js

@@ -127,11 +127,9 @@ function withConfigLoader(cb) {
         } else {
           configPath = file.dirname
         }
+        contextOptions.file = file
         return postcssLoadConfig(
-          {
-            file: file,
-            options: contextOptions
-          },
+          contextOptions,
           configPath
         )
       })

test.js

@@ -329,7 +329,7 @@ describe('PostCSS Guidelines', function () {
     stream.on('data', function () {
       assert.deepEqual(postcssLoadConfigStub.getCall(0).args[0], {
         file: file,
-        options: { to: 'initial' }
+        to: 'initial'
       })
       assert.equal(postcssStub.use.getCall(0).args[0], plugins)
       assert.equal(postcssStub.process.getCall(0).args[1].to, 'overriden')