chore(deps): switch to memfs (#791)

Author: jamesgeorge007

package-lock.json

@@ -84,7 +84,7 @@
     "jest-junit": "^8.0.0",
     "jquery": "^3.4.1",
     "lint-staged": "^9.4.2",
-    "memory-fs": "^0.4.1",
+    "memfs": "^3.0.3",
     "node-sass": "^4.12.0",
     "npm-run-all": "^4.1.5",
     "popper.js": "^1.15.0",

package.json

@@ -6,7 +6,7 @@
 import del from 'del';
 import path from 'path';
 import webpack from 'webpack';
-import MemoryFS from 'memory-fs';
+import { createFsFromVolume, Volume } from 'memfs';
 
 const module = (config) => {
   return {
@@ -70,7 +70,8 @@ export default function(fixture, config = {}, options = {}) {
   const compiler = webpack(config);
 
   if (!options.output) {
-    compiler.outputFileSystem = new MemoryFS();
+    compiler.outputFileSystem = new createFsFromVolume(new Volume()); // eslint-disable-line
+    compiler.outputFileSystem.join = path.join.bind(path);
   }
 
   return new Promise((resolve, reject) =>