fix deptrac config to allow http clients

[brettmc]

This quietens some deptrac warnings about uncovered dependencies for recently-added http clients.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.97%. Comparing base (f2cba82) to head (ed532ca).

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #1293   +/-   ##
=========================================
  Coverage     73.97%   73.97%           
  Complexity     2365     2365           
=========================================
  Files           347      347           
  Lines          7071     7071           
=========================================
  Hits           5231     5231           
  Misses         1840     1840           

Flag	Coverage Δ
8.1	73.97% <ø> (ø)
8.2	73.97% <ø> (ø)
8.3	73.97% <ø> (ø)
8.4	72.84% <ø> (ø)

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