2019.01.15.0

Bump version: 2019.01.15.0

2018.10.30.0

Update Sogou search engine

Use both 'query' and 'keyword' as keyword extractor.

2018.07.03.1

Fix version

2018.07.03.0

Fix chardet version range

2018.02.28.0

Merge pull request #20 from RussellLuo/update-sogou-search-engine

Add `{}.sogou.com` into Sogou search engine

2017.10.20.0: Merge pull request #17 from RussellLuo/update-shenma-search-engine

Update shenma search engine