fix: filter won't apply when transformed

fix vladshcherbin#59

Author: SettingDust

src/index.js

@@ -112,7 +112,9 @@ export default function copy(options = {}) {
           const { contents, dest, src, transformed } = copyTarget
 
           if (transformed) {
-            await fs.outputFile(dest, contents, restPluginOptions)
+            if (!restPluginOptions.filter || restPluginOptions.filter(src, dest)) {
+              await fs.outputFile(dest, contents, restPluginOptions)
+            }
           } else {
             await fs.copy(src, dest, restPluginOptions)
           }