Bumps mailgun adapter

[flovilmart]

No description provided.

[codecov]

Codecov Report

Merging #4753 into master will decrease coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4753      +/-   ##
==========================================
- Coverage   92.67%   92.62%   -0.05%     
==========================================
  Files         119      119              
  Lines        8585     8585              
==========================================
- Hits         7956     7952       -4     
- Misses        629      633       +4

Impacted Files	Coverage Δ
src/Routers/PushRouter.js	92.85% <0%> (-3.58%)	⬇️
src/RestWrite.js	93.23% <0%> (-0.37%)	⬇️
...dapters/Storage/Postgres/PostgresStorageAdapter.js	97.15% <0%> (-0.1%)	⬇️

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