sopel-search 1.0.0

First release of sopel-search.

This new search plugin apes a lot of behaviors from Sopel's built-in search,
with the following notable changes:

• .bing is no longer available
• .search is an alias to .ddg, as .g was already
• Search region and safesearch level are now configurable
• .suggest uses DuckDuckGo; Google suggestions are still available via the
  new .gsuggest command (if optional extra dependencies are installed)