[Serverless Mini Agent] Bump Serverless Mini Agent Version to 0.4.2

[duncanpharvey]

What does this PR do?

Bumps Serverless Mini Agent Version to 0.4.2.

Motivation

Upcoming release of version 0.4.2.

Additional Notes

Setting correctly for upcoming release of version 0.4.2.

How to test the change?

• Build mini agent locally
• Deploy Azure Function or Google Cloud Function with mini agent binary in root path
• Set DD_MINI_AGENT_PATH
  • Azure: /home/site/wwwroot/datadog-serverless-trace-mini-agent
  • Google: /workspace/datadog-serverless-trace-mini-agent

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 69.54%. Comparing base (d4d96ba) to head (138a6f4).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #502   +/-   ##
=======================================
  Coverage   69.54%   69.54%           
=======================================
  Files         201      201           
  Lines       26846    26846           
=======================================
  Hits        18670    18670           
  Misses       8176     8176           

Components	Coverage Δ
crashtracker	16.70% <ø> (ø)
datadog-alloc	98.76% <ø> (ø)
data-pipeline	51.30% <ø> (ø)
data-pipeline-ffi	0.00% <ø> (ø)
ddcommon	85.97% <ø> (ø)
ddcommon-ffi	74.15% <ø> (ø)
ddtelemetry	56.37% <ø> (ø)
ipc	84.66% <ø> (ø)
profiling	78.63% <ø> (ø)
profiling-ffi	58.19% <ø> (ø)
serverless	0.00% <ø> (ø)
sidecar	36.26% <ø> (ø)
sidecar-ffi	0.00% <ø> (ø)
spawn-worker	54.98% <ø> (ø)
trace-mini-agent	69.36% <ø> (ø)
trace-normalization	97.79% <ø> (ø)
trace-obfuscation	95.75% <ø> (ø)
trace-protobuf	52.56% <ø> (ø)
trace-utils	91.61% <ø> (ø)

[brandondatadog]

So simple, even a PM can review it