feat: support webpack 5 hooks (#1469)

Author: clarkdo

lib/plugin.js

@@ -10,7 +10,14 @@ class VueLoaderPlugin {
     if (compiler.hooks) {
       // webpack 4
       compiler.hooks.compilation.tap(id, compilation => {
-        compilation.hooks.normalModuleLoader.tap(id, loaderContext => {
+        let normalModuleLoader
+        if (Object.isFrozen(compilation.hooks)) {
+          // webpack 5
+          normalModuleLoader = require('webpack/lib/NormalModule').getCompilationHooks(compilation).loader
+        } else {
+          normalModuleLoader = compilation.hooks.normalModuleLoader
+        }
+        normalModuleLoader.tap(id, loaderContext => {
           loaderContext[NS] = true
         })
       })

package.json

@@ -34,7 +34,7 @@
   },
   "peerDependencies": {
     "css-loader": "*",
-    "webpack": "^4.1.0"
+    "webpack": "^4.1.0 || ^5.0.0-0"
   },
   "dependencies": {
     "@vue/component-compiler-utils": "^2.4.0",