fix: addTemplate call compats low version nuxt (#225)

Co-authored-by: sponge <cengchuanqiu@deepexi.com>

lib/module.js

@@ -7,7 +7,7 @@ const logger = require('./logger')
 const defaultTailwindConfig = require('./files/tailwind.config.js')
 
 module.exports = async function (moduleOptions) {
-  const { nuxt, addTemplate } = this
+  const { nuxt } = this
   const options = defu.arrayFn(moduleOptions, nuxt.options.tailwindcss, {
     configPath: 'tailwind.config.js',
     cssPath: join(nuxt.options.dir.assets, 'css', 'tailwind.css'),
@@ -99,7 +99,11 @@ module.exports = async function (moduleOptions) {
       const resolvedConfig = resolveConfig(tailwindConfig)
 
       // Render as a json file in buildDir
-      addTemplate({
+      /**
+       * nuxt ModuleContainer bind 'this' to addTemplate until v2.13.0，use this.addTemplate to compat with low version
+       * issue: https://github.com/nuxt-community/tailwindcss-module/issues/224
+       */
+      this.addTemplate({
         src: resolve(__dirname, 'templates/tailwind.config.json'),
         fileName: 'tailwind.config.json',
         options: { config: resolvedConfig }