fix(utils): prevent errors for modules without resources

Author: rajdee

lib/utils/mapped-list.js

@@ -85,7 +85,10 @@ class MappedList {
     const { symbols, spriteModules, allModules, rules } = this;
     const data = symbols.reduce((acc, symbol) => {
       const resource = symbol.request.file;
-      const module = spriteModules.find(m => m.resource.split('?')[0] === resource);
+      const module = spriteModules.find(m => 'resource' in m
+        ? m.resource.split('?')[0] === resource
+        : false
+      );
       const rule = getMatchedRule(resource, rules);
       const options = rule ? getLoaderOptions(spriteLoaderPath, rule) : null;
       let spriteFilename = (options && options.spriteFilename)