pyecharts.render.snapshot 参数fix

[BradyHu]

本次 PR 内容，
修复snapshot_selenium 参数问题
before：非关键字传参，导致delay和pixel_ratio参数作用错位
after：fixed

[codecov-io]

Codecov Report

Merging #1412 into dev will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##              dev    #1412   +/-   ##
=======================================
  Coverage   94.39%   94.39%           
=======================================
  Files         104      104           
  Lines        2870     2870           
=======================================
  Hits         2709     2709           
  Misses        161      161

Impacted Files	Coverage Δ
pyecharts/render/snapshot.py	71.42% <100%> (ø)	⬆️

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[BradyHu]

啊啊啊 这个，可算是通过编译了，我太难了,...

[sunhailin-Leo]

@BradyHu

• 为了再让你巩固一下流程
  • 建议你从你仓库的 dev 分支提 pr，一来可以和主仓库代码同步
  • 参考地址：贡献说明