extractors/iqiyi: switch to new algorithm

[iawia002]

refer #343
fix #316

[codecov]

Codecov Report

Merging #348 into master will decrease coverage by 0.83%.
The diff coverage is 90.19%.

@@            Coverage Diff             @@
##           master     #348      +/-   ##
==========================================
- Coverage    72.5%   71.66%   -0.84%     
==========================================
  Files          29       29              
  Lines        2051     2068      +17     
==========================================
- Hits         1487     1482       -5     
- Misses        400      424      +24     
+ Partials      164      162       -2

Impacted Files	Coverage Δ
extractors/iqiyi/iqiyi.go	85.58% <90.19%> (+2.6%)	⬆️
extractors/vimeo/vimeo.go	35% <0%> (-50%)	⬇️
extractors/youtube/youtube.go	82.85% <0%> (-1.43%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6aaffd3...d33847f. Read the comment docs.