Change controlling process spec to Process.dest()

[LVala]

No description provided.

[codecov]

Codecov Report

Merging #97 (6d8f962) into master (8cbead2) will increase coverage by 0.07%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #97      +/-   ##
==========================================
+ Coverage   88.43%   88.50%   +0.07%     
==========================================
  Files          32       32              
  Lines        1565     1566       +1     
==========================================
+ Hits         1384     1386       +2     
+ Misses        181      180       -1     

Files	Coverage Δ
lib/ex_webrtc/peer_connection.ex	85.35% <ø> (+0.02%)	⬆️
lib/ex_webrtc/peer_connection/configuration.ex	89.33% <ø> (ø)

... and 1 file with indirect coverage changes

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