Update mongoose version to 5.7.7

lib/docs/scrapers/mongoose.rb

@@ -2,8 +2,8 @@ module Docs
   class Mongoose < UrlScraper
     self.name = 'Mongoose'
     self.type = 'simple'
-    self.release = '4.13.1'
+    self.release = '5.7.7'
-    self.base_url = 'http://mongoosejs.com/docs/'
+    self.base_url = 'https://mongoosejs.com/docs/'
     self.root_path = 'index.html'
     self.initial_paths = %w(guide.html api.html)
     self.force_gzip = true