Replacing is wrong if values or regexps contain $ character.

[shackijj]

Hello!

I tried to use the plugin for replacing $$TEST$$ string in the code. The plugin didn't change anything.

Config example:

const ReplacePlugin = require('webpack-plugin-replace');
module.exports = {
  // ...
  plugins: [
    new ReplacePlugin({
      exclude: [
        'foo.js',
        /node_modules/,
        filepath => filepath.includes('ignore')
      ],
      values: {
        '$$TEST$$': 'FOO',
      }
    })
  ]
};

[GerkinDev]

This can be widen to any regex special char, given that they are not escaped. See https://github.com/lukeed/webpack-plugin-replace/blob/master/lib/index.js#L54

@lukeed I would be OK to PR to close this one and #6 at once, if you can confirm that you can merge and release.