feat(plugin): enable server brotli if supported (closes nuxt-community#276)

Author: pooya parsa

lib/plugin.js

@@ -4,6 +4,13 @@ import defu from 'defu'
 
 const globalName = '<%= globalName %>'
 
+// Check Node.js brotli support
+let brotliSupported
+if (process.server) {
+  const zlib = require('zlib')
+  brotliSupported = typeof zlib.createBrotliDecompress == 'function'
+}
+
 // Axios.prototype cannot be modified
 const axiosExtra = {
   setBaseURL (baseURL) {
@@ -206,8 +213,8 @@ export default (ctx, inject) => {
   }
   <% } %>
 
-  if (process.server) {
-    // Don't accept brotli encoding because Node can't parse it
+  // Don't accept brotli encoding because Node can't parse it
+  if (process.server && !brotliSupported) {
     axiosOptions.headers.common['accept-encoding'] = 'gzip, deflate'
   }