Upgrade deps to 1.18

[houshengbo]

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[knative-prow]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 47.55%. Comparing base (c00f2e1) to head (7f45b95).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #290   +/-   ##
=======================================
  Coverage   47.55%   47.55%           
=======================================
  Files          25       25           
  Lines        2675     2675           
=======================================
  Hits         1272     1272           
  Misses       1356     1356           
  Partials       47       47           

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[knative-prow]

New changes are detected. LGTM label has been removed.