Fix - missing proxy configuration

[Dineshkarthik]

The new proxy configuration is not passed to the Pyrogram Client while imitating thus the proxy is not applied.

fixes: #299 #300

[codecov]

Codecov Report

Merging #301 (33335e0) into master (f2ffe14) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #301   +/-   ##
=======================================
  Coverage   98.92%   98.92%           
=======================================
  Files           6        6           
  Lines         186      186           
=======================================
  Hits          184      184           
  Misses          2        2           

Impacted Files	Coverage Δ
media_downloader.py	98.34% <ø> (ø)
utils/__init__.py	100.00% <100.00%> (ø)

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