Append .map extension to output filename

Author: camerondubas

lib/process-file.js

@@ -9,7 +9,7 @@ const getSourceMapContent = require('./get-sourcemap-content');
 
 module.exports = async function processFile(inFile, outFile, relativePath, outDir, silent, _options) {
   let src = fs.readFileSync(inFile, 'utf-8');
-  let mapName = `${path.basename(outFile).replace(/\.js$/, '')}.map`;
+  let mapName = `${path.basename(outFile)}.map`;
 
   let mapDir;
   if (_options.sourceMapDir) {