fix(webpack): Ignore fs import on copc dependency

Ignoring fs for all modules led to problems with eslint (which depends
on fs).

webpack.config.js

@@ -1,5 +1,6 @@
 const fs = require('fs');
 const path = require('path');
+const webpack = require('webpack');
 const ESLintPlugin = require('eslint-webpack-plugin');
 
 const mode = process.env.NODE_ENV;
@@ -45,9 +46,6 @@ module.exports = () => {
         context: path.resolve(__dirname),
         resolve: {
             modules: [path.resolve(__dirname, 'src'), 'node_modules'],
-            alias: {
-                'fs': false,
-            },
         },
         entry: {
             itowns: [
@@ -83,9 +81,17 @@ module.exports = () => {
                 },
             ],
         },
-        plugins: [new ESLintPlugin({
-            files: include,
-        })],
+        plugins: [
+            new ESLintPlugin({
+                files: include,
+            }),
+            // Prevent the generation of module fs for import on copc dependency
+            // See https://webpack.js.org/plugins/ignore-plugin/
+            new webpack.IgnorePlugin({
+                resourceRegExp: /^fs$/,
+                contextRegExp: /copc/,
+            }),
+        ],
         devServer: {
             devMiddleware: {
                 publicPath: '/dist/',