added certifi https download + bugfix on win

[kiwi0fruit]

No description provided.

[codecov-io]

Codecov Report

Merging #189 into dev will increase coverage by 0.01%.
The diff coverage is 40%.

@@            Coverage Diff             @@
##              dev     #189      +/-   ##
==========================================
+ Coverage   92.42%   92.43%   +0.01%     
==========================================
  Files          48       48              
  Lines        7075     7076       +1     
==========================================
+ Hits         6539     6541       +2     
+ Misses        536      535       -1

Impacted Files	Coverage Δ
pyppeteer/chromium_downloader.py	40.47% <40%> (+1.92%)	⬆️
pyppeteer/helper.py	89.32% <0%> (-3.89%)	⬇️
pyppeteer/network_manager.py	92.34% <0%> (+0.26%)	⬆️
pyppeteer/execution_context.py	93.28% <0%> (+0.74%)	⬆️
pyppeteer/launcher.py	89.06% <0%> (+1.04%)	⬆️

---

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 fa5770e...cf633c1. Read the comment docs.