Update module github.com/florianl/go-conntrack to v0.3.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
github.com/florianl/go-conntrack	require	minor	v0.2.1-0.20210306083143-59e800ab9734 -> v0.3.0

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Configuration

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[codecov]

Codecov Report

Merging #199 (da7784a) into master (d1acabd) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #199   +/-   ##
=======================================
  Coverage   24.50%   24.50%           
=======================================
  Files           2        2           
  Lines         200      200           
=======================================
  Hits           49       49           
  Misses        149      149           
  Partials        2        2           

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