fix(mp-plugin): find moduleId

packages/webpack-uni-mp-loader/lib/plugin/index-new.js

@@ -65,7 +65,12 @@ function addMPPluginRequire (compilation) {
       const orignalSource = compilation.getAsset(name).source.source()
       const globalEnv = process.env.UNI_PLATFORM === 'mp-alipay' ? 'my' : 'wx'
       const filePath = normalizePath(path.resolve(process.env.UNI_INPUT_DIR, name))
-      const uniModule = modules.find(module => module.resource && normalizePath(module.resource) === filePath)
+      let uniModule = modules.find(module => module.resource && normalizePath(module.resource) === filePath)
+      if (!uniModule && webpack.version[0] > 4) {
+        uniModule = modules.find(module =>
+          module.rootModule && module.rootModule.resource && normalizePath(module.rootModule.resource) === filePath
+        )
+      }
       const uniModuleId = getModuleId(compilation, uniModule)
 
       const source = orignalSource + `\nmodule.exports = ${globalEnv}.__webpack_require_UNI_MP_PLUGIN__('${uniModuleId}');\n`