Log Message:
gallery-dl: Update to 1.8.0

Changes:
1.8.0
-----
### Added
- Support for:
  - `weibo`
  - `pururin` (#174)
  - `fashionnove` (#175)
  - `shopify` sites in general (#175)
- Snap packaging (#169, #170, #187, #188)
- Automatic Cloudflare DDoS protection bypass
- Extractor and Job information for logging format strings
  - `dynastyscans` image and search extractors (#163)
  - `deviantart` scraps extractor (#168)
  - `artstation` extractor for artwork listings (#172)
  - `smugmug` video support and improved image format selection (#183)

### Changed
- More metadata for `nhentai` galleries
- Combined `myportfolio` extractors into one
- Renamed `name` metadata field to `filename` and removed the original \ 
`filename` field
- Simplified and improved internal data structures
- Optimized creation of child extractors

### Fixed
- Filter empty `tumblr` URLs (#165)
- Filter ads and improve connection speed on `hentaifoundry`
- Show proper error messages if `luscious` galleries are unavailable
- Miscellaneous issues on `mangahere`, `ngomik`, `simplyhentai`, `imgspice`

### Removed
- `seaotterscans`