[@foal/mongodb] Upgrade MongoDB to v3.4.1

[LoicPoullain]

Issue

MongoDB released a new patch version 3.4.

Solution and steps

• Upgrade MongoDB version from 3.3 to 3.4 in @foal/mongodb.

Checklist

• Add/update/check docs (code comments and docs/ folder).
• Add/update/check tests.
• Update/check the cli generators.

[codecov]

Codecov Report

Merging #609 into v1-4-0 will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           v1-4-0     #609   +/-   ##
=======================================
  Coverage   99.63%   99.63%           
=======================================
  Files          90       90           
  Lines        1632     1632           
  Branches      364      364           
=======================================
  Hits         1626     1626           
  Misses          6        6

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