Revert "chore(deps-dev): bump ember-source from 3.16.1 to 3.16.2"

[kushthedude]

Reverts #4049

Fixes #4062

• This broke the every request the infinityLoader was sending to the server, hence neither the speaker nor session page was working.

[codecov]

Codecov Report

Merging #4063 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #4063   +/-   ##
=======================================
  Coverage   21.89%   21.89%           
=======================================
  Files         460      460           
  Lines        4736     4736           
=======================================
  Hits         1037     1037           
  Misses       3699     3699

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