Dependabot fixes

[cpheps]

Description of Changes

Address dependabot issues:

• https://github.com/observIQ/stanza/security/dependabot/1
• https://github.com/observIQ/stanza/security/dependabot/3

Please check that the PR fulfills these requirements

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• Add a changelog entry (for non-trivial bug fixes / features)
• CI passes

[codecov]

Codecov Report

Merging #568 (4dc200e) into master (3b23e5c) will decrease coverage by 1.90%.
The diff coverage is 68.29%.

@@            Coverage Diff             @@
##           master     #568      +/-   ##
==========================================
- Coverage   76.69%   74.78%   -1.90%     
==========================================
  Files         132      132              
  Lines        8308     9993    +1685     
==========================================
+ Hits         6371     7473    +1102     
- Misses       1473     2057     +584     
+ Partials      464      463       -1     

Impacted Files	Coverage Δ
operator/builtin/input/azure/event_hub.go	0.00% <0.00%> (ø)
operator/builtin/input/file/reader.go	53.05% <0.00%> (-5.73%)	⬇️
operator/builtin/input/udp/udp.go	73.49% <ø> (-1.51%)	⬇️
operator/builtin/output/forward/forward.go	56.70% <0.00%> (-3.79%)	⬇️
operator/builtin/output/newrelic/newrelic.go	71.62% <33.33%> (-2.76%)	⬇️
operator/builtin/input/generate/generate.go	79.10% <66.67%> (-1.60%)	⬇️
cmd/stanza/service.go	62.16% <100.00%> (-5.48%)	⬇️
entry/nil_field.go	100.00% <100.00%> (ø)
operator/buffer/disk.go	68.37% <100.00%> (-0.18%)	⬇️
operator/buffer/disk_metadata.go	36.50% <100.00%> (-5.81%)	⬇️
... and 143 more

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