message: Improve English & SEO in migration guide -> Methods
  migrate-to-6(gh-page): improve readability
  migrate-to-6(gh-page): improve "Methods" section
  This is a squash merge of typegoose/typegoose#251
diff: @@ -47,11 +47,11 @@ Hooks got (in 6.0.0-13) a change for the types to comply with the latest mongoos
  ## Methods (staticMethod, instanceMethod, virtuals)
  -`@staticMethod` & `@instanceMethod` got deprecated in favor of `schema.loadClass()`
  -(means these decorators are no more needed, so they are auto-detected)
  +`@staticMethod` & `@instanceMethod` were deprecated in favor of `schema.loadClass()`. These decorators are no longer needed, because the methods are auto-detected.
  -for virtual-populates use `@prop({ localField, foreignField })` and no more `overwrite` option is needed, it will auto detect if one of these values is included
  -for normal virtuals, just use `get somevalue() { return ''; }` and `set somevalue(val: string) { }` (no more `@prop` needed)
  +For [virtuals](https://mongoosejs.com/docs/tutorials/virtuals.html), simply use `get somevalue() { return ''; }` and `set somevalue(val: string) { }` (`@prop` is no longer needed). [[New Documentation]({{ site.baseurl }}{% link _docs/virtuals.md %}#get--set)]
  +
  +For [populating virtuals](https://mongoosejs.com/docs/tutorials/virtuals.html#populate), use `@prop({ localField, foreignField })`. The `overwrite` option is no longer needed. [[New Documentation]({{ site.baseurl }}{% link _docs/virtuals.md %}#virtual-populate)]
  Update: `@staticMethod` & `@instanceMethod` got removed in 6.1.0-1
  