internal: incomplete vault systems behind feature flag (#2340)

packages/snjs/webpack.dev.js

@@ -1,5 +1,6 @@
-const { merge } = require('webpack-merge');
-const config = require('./webpack.config.js');
+const { merge } = require('webpack-merge')
+const config = require('./webpack.config.js')
+const webpack = require('webpack')
 
 module.exports = merge(config, {
   mode: 'development',
@@ -7,4 +8,9 @@ module.exports = merge(config, {
   stats: {
     colors: true,
   },
-});
+  plugins: [
+    new webpack.DefinePlugin({
+      __IS_DEV__: true,
+    }),
+  ],
+})