Fix issue hitting breakpoint (#231)

webpack.config.js

@@ -23,7 +23,7 @@ const config = {
         path: path.resolve(__dirname, 'dist', 'scripts'),   // the clipboardy package ships with binaries in the fallbacks folder and reference them with "../fallbacks/*"
         filename: 'extension.js',
         libraryTarget: "commonjs2",
-        devtoolModuleFilenameTemplate: "../[resource-path]",
+        devtoolModuleFilenameTemplate: "../../[resource-path]",
     },
     devtool: 'source-map',
     externals: {