Merge pull request #71 from FidelLimited/mangle-false

fix(src/index.js): set mangle false

Author: goncaloneves

src/index.js

@@ -397,7 +397,7 @@ class Optimize {
  if (functionOptions.minify) {
  functionOptions.presets = [[require.resolve('babel-preset-minify'), {
  builtIns: false,
- mangle: true
+ mangle: false
  }]].concat(functionOptions.presets)
  }