Update dependencies

No issue
- html-to-text@1.0.0
- bcryptjs@2.0.2
- compression@1.2.0
- rss@1.0.0
- grunt-contrib-uglify@0.6.0
- sqlite3@3.0.2
- mysql@2.5.2
Output spaces instead of tabs in buildAbout task

No Issue
Merge pull request #4315 from jaswilli/deps

Update dependencies
Merge pull request #4318 from jaswilli/about-tabs

Output spaces instead of tabs in buildAbout task
Change slug and date placeholders to values

Closes #4121
Fix no show of default Twitter card

No issue
- change default Twitter card from content to summary
Merge pull request #4326 from lcamacho/master

Fixed default twitter card
Custom permalink UI

References #3920
Merge pull request #4323 from jaswilli/issue-4121

Change slug and date placeholders to values
Merge pull request #4217 from PaulAdamDavis/permalinks-ui

[WIP] Custom Permalink UI
合并官方更新
修复搜索引擎呈现摘要，字数统计BUG